Tough call, but I'm gonna go with Fighters (Tekken, DOA, Soul Caliber, etc.). I feel I can find some value other than entertainment to most other styles, but Fighters just seem to lack any feeling of worth. This is also because I'm horribly coordinated and fail to do anything that resembles a combo and could care less if this genre disappeared.
Except for the guys over at Arc Entertainment. I love the stories and design that goes along with the Guilty Gear series. But it is just another group of fighters I fail miserably at :\