Ben 10: Alien Force/YMMV

"Ben: Was she cute? Kevin: More than cute; hot!"
 * Angst? What Angst?: Despite Grandpa Max apparently dying in Season 1, Ben and Gwen's fathers don't seem to be in particular mourning over him. To be fair, they're only seen in one episode apiece, but one such episode ("What Are Little Girls Made Of") does reference what happened to Max quite a bit.
 * Also, right after he seemed to die, Ben and Gwen immediately composed themselves. No tears, no anguish, no nothing.
 * Badass Decay: Kevin and Vilgax suffer a lot of this. The general consensus is that Kevin got better in Season 3, but Vilgax (ironically only featuring in that very season) never recaptured his former glory.
 * Broken Base: The series as a whole. While a lot of fans despised the show (see Contested Sequel above), some of them actually loved the Darker and Edgier take and found it an improvement..
 * Character Rerailment: Vilgax's characterization and voice (though the voice was still done by John Dimaggio) were a bit closer to how he was originally portrayed in the first series in the video game Vilgax Attacks!.
 * Copy Cat Sue: Albedo is a possible parody. He got a second Omnitrix, helped created original, comes back with even more powerful version of it and he got an incredibly simple design.
 * Contested Sequel: Quite a few people treat Alien Force as this and thus Fanon Discontinuity, mostly because of stuff like making Gwen's magic powers into alien energy manipulation and that a lot of things in Alien Force don't match up and even ignores stuff established in the original series. Still, some fans did appreciate this sequel, as noted in Broken Base above.
 * Crowning Moment of Awesome: Rath
 * Draco in Leather Pants: Albedo, though easily explanable due to his Ineffectual Sympathetic Villain status.
 * Ensemble Darkhorse: You like Rath, dontcha?  Everyone likes Rath!   You know what happens to people who don't like Rath? LET ME TELL YOU SOMETHING, GUYS WHO DON'T LIKE RATH!!! 
 * Albedo, who rarely appears, is surpisingly popular among the fans too, as mentioned previously.
 * And let's not forget time-travelling the Doctor Expy Paradox, whose even most of the Alien Force haters actually love.
 * Evil Is Sexy: Still Charmcaster. Ben and Kevin even lampshade it in the episode she appears in.


 * Fan Dumb / Hate Dumb: While some of the criticism to Alien Force are justified, the hate toward the show from original series fans can go to the ridiculously extreme occasionnally.
 * Fan-Preferred Couple: If you haven't already noticed that there's a large fanbase who hates Kevin/Gwen and wants Ben/Gwen, this is probably the first time you've ever visited Tv Tropes.
 * There are quite a few who want Kevin/Ben as well.
 * Foe Yay: Gwen with both Darkstar and Charmcaster. Ben and Kevin qualify as "Former Foe Yay".
 * Fridge Horror: Imagine being Alien X. You're all-powerful, capable of bending time and space... and unless the voices in your head agree to do anything, you're stuck in place, forced to stand by while horrible things happen.
 * Genius Bonus: The Tiffin. If you know what the term means then it's no surprise that
 * Like You Would Really Do It: Nearly averted with, whom they were planning on killing off, but decided not to.
 * Narm: Vilgax's so-called ultimate form? Sad because it could have been a great scene if not for limited efforts on the design and a fight that is not even seen onscreen.
 * Relationship Writing Fumble: The Kissing Cousins "relationship" of Gwen and Ben is not only back, but it becomes a "love triangle" by adding Ho Yay between Ben and Kevin.
 * Romantic Plot Tumor: Gwen and Kevin, quite often.
 * The Scrappy: Julie was this for a while, but got Rescued From the Scrappy Heap midway through the second season.
 * There are many who don't like the Anodite species as a whole, due to what is felt to be a pointless, as well as sometimes incredibly confusing Retcon, with the representatives of the species not being very well-regarded either.
 * Seasonal Rot: The third and final season seems to be the least popular overall, mainly due to Vilgax's Villain Decay; even after it (mostly) came back in the Grand Finale, the . Not that it's entirely hated though, as it did introduce us to RATH!!!
 * Strangled by the Red String: Gwen and Kevin are one of the finest examples.
 * They Wasted a Perfectly Good Plot: The whole "Form A Team Of Plumber Kids".
 * And even what they did of this plot didn't amount to much. For a series called Alien Force, the only major things thing they did was fight the Highbreed at the end of season 2, get their asses handed to them by Vilgax at the beginning of season 3 and then got sent off to the Plumber Academy after "Above and Beyond". One must wonder what the point to this plot was when pretty much everything important amounted to Ben, Gwen and Kevin (and Max after season 2)doing all the work.
 * Some people complained about things that are established, but are just dropped, or otherwise not elaborated upon (Why Ben decided to remove the Omnitrix, which could have tied into him wondering if his job as a hero is worth it, Kevin being Easily Forgiven and almost entirely trusted, among a few other things.).
 * Villain Decay: The Forever Knights were an ancient cult seeking alien technology to facilitate their world conquest. Now, it seems it started in trying to find tech to kill an alien dragon. Fortunately corrected in Ben 10: Ultimate Alien.
 * Vilgax is especially known to have suffered this in this show: he got a new, physically much less impressive design, defeated several times by Ben with relative ease occasionnally (despite the fact Ben could hardly handle him in the original show). He also relied on law during his first appearance, which was seen by fans as Out of Character considering his sadistic, genocidal personnality from the original show (though it was strongly implied he did it only to use the law to his advantage; in his later appearances, he has no problem screwing the rules). Similarly, him being double-crossed and kicked of his own planet by Ghostfreak, as well as saving a little alien girl from his empire, was perceived as such as well. The worst however was in Secret of Chromastone, where he ended up catching a cold at the end of the episode (Especially sad considering he was portrayed as actually evil and dangerous before this silly ending). All of this was partially corrected in the finale, and thanksfully again in Ben 10: Ultimate Alien.
 * After being a big threat in her debut episode due to powerful magic and cleverness, Charmcaster returns in an alternate timeline in "Time Heals", constantly boasting about how she killed that timeline's Gwen...only to get kicked around by present-Gwen on multiple occasions. It leaves one with the impression she only managed to kill her timeline's Gwen because she got lucky.
 * They Changed It, Now It Sucks: The reaction of several fans about the show.
 * Took a Level In Badass: Ben (in the first two seasons, at least.)
 * Took a Level In Dumbass: Ben in season 3, as mentioned above.
 * Ugly Cute: Argit. There are some people out there (mostly fangirls and furries) who adore him.