Doing It for the Art: Their philosophy. Both their greatest strength and their greatest weakness, and partially responsible for their downfall. Notably, a couple of their games [1] saw them spend too much time on the art at the expense on the actual game beneath it.
Fan Nickname: SNK Delaymore is a Detractor Nickname from fans who believe that it takes SNKP forever to release a new game (the worst example being the amount of time it took for the dev team to redraw their sizable pool of characters for The King of Fighters XII). SNK Crymore is a counter nickname to the above, used by fans irked by the complaints of the first group. It'd be best to leave it at that.
Follow the Leader: A lot of SNK's pre and early Neo Geo games were clones of what was popular at the time. Compare Final Fight and Burning Fight, Xevious and Alpha Mission, Hang-On and Riding Hero, Twin Hawk (or depending which way you look at it, the 19XX series) and Ghost Pilots... etc.
Hey, It's That Voice!: SNK has its own group of in-house seiyuu (technically speaking [2]), and as such, you'll probably see the same names pop up in credits. Most of the more regular members such as Satoshi Hashimoto and Harumi Ikoma have been working with SNK since the early 90s (see The Other Darrin below) and a good portion of them voice multiple characters[3]. In addition, several big name seiyuu in the business have been called in to provide voice acting for characters (a more notable case being Norio Wakamoto himself on more than one occasion [4]), some of them before they truly hit their stride in the industry (examples including Eiji Takemoto and Katsuyuki Konishi respectively as Rock Howard and Maxima).
The Other Darrin: SNK is actually notable for trying very hard to avert this; some of their characters have had the same voice actor for almost two decades now. It's notable because their older characters were from a time when voice acting in video games was generally a novelty, and was delivered by whoever was around. However, starting with The King of Fighters XII, this trope has slowly began to inch up on SNK, probably because the company has to mind the availability of the actors and age has likely caught up to some of the talent. For example, Terry and Kim used to have the same VA (Satoshi Hashimoto), but the role of Kim was assumed by Kazuhiko Nagata from KOF XII onward. With the release of XIV, the large majority of the returning cast, even the more iconic ones, sport new voice actors.
↑Samurai Shodown III and Art of Fighting 3 for starters
↑the various seiyuu are affiliated with their own agencies, but are frequently used in SNK titles
↑with certain seiyuu such as Eiji Yano amd Monster Maezuka qualifying for Man of a Thousand Voices status
↑Igniz in KOF 2001, Rugal in KOF 2002 (although he was darrin'd by Rugal's original VA, Toshimitsu Arai, come its Updated Rerelease, 2002: Unlimited Match), and Golboa in Samurai Shodown Sen