Lost Saga/YMMV

Complacent Gaming Syndrome: The game attempts to subvert this by making the more popular heroes more expensive. Also, blocking will block all frontal attacks except for skills and certain "defense break" moves, which helps reduce spamming...a little.
Crazy Awesome: The aptly-named Crazy Sapper. He's willing to drop an atomic bomb on himself to destroy his enemies. Luckily, the Sapper has a instant, indestructible Beehive Barrier in his helmet to protect him from the blast.
Game Breaker: A few. The most egregious example is the Tao Warrior in Boss Raid. The Boss has reduced cooldown on all his skills, and all of his attacks do tremendous knockback. Let's see what the Tao has, shall we? A massive sweeping strike that clears out everything in a full circle, a ground-pound that throws everyone into the air, a blast of wind that does a lot of knockback even when not Super-Sized, and a trinket skill that instantly refreshes all of these? Let's not even get into the mix and match heroes you can get by Bribing Your Way to Victory.
- You don't even HAVE to be bribing your way to victory, just get lucky off the non-real-money-game-currency Epic Gear chests or buy the Epic Gear from the store (though the gears you get will probably be on a time limit). For example, that scroll that recharges skills? you can get that in the Epic Gear chests. You can also get other utterly devastating gears; two of the most deadly in Boss Raid being the Epic Berserker Helm with its ridiculous charge attack and Epic Ice Mage Robe with its proximity-ranged blast of ice spikes that will likely send people flying through the air to their death via falling off the map.
Goddamn Bats: In the hardest setting for Crusade mode, the enemy mooks will always be this by around floor 43. Even more so on Mini Boss floors. Only gets this bad on mini boss floors and around floor 36 in Medium difficulty.
That One Boss: No matter who you are, there will always be one kind of Undead Hero you DON'T want as a mini boss in Crusade. Dark Shamans, Fire Mages, and Ice Mages seem to be the most outright hated. The final boss of each difficulty, the Undead Reaper, will always be this.
- I recently found out that the Undead Cowboy mini-boss never has to reload...ever. The Computer Is a Cheating Bastard.
  - Actually, on that subject it's probably safe to assume the normal Undead Cowboys don't reload. Or the Undead Infantrymen. Or Undead Treasure Hunters. About the only one who WOULD reload is the Undead Space Trooper since the gun cools down between shots.