Pretty much all 3d one on one fighting games, I'm a SF2 nut, and from Tekken onwards, everything got way too complex with its 10 button combos, SF2 had style, with a set of about 5 special move motions spread thru all the characters, they built such a depth of gameplay.
I can't beat a blidfolded gibbon at anything like Soul Calibur and the like tho.
Also, stealth games, but that's because I don't class 'waiting' as a gameplay style, I just want to get on with it, not stare at a radar for 5 minutes til I'm 'allowed' to go, like some lollipop lady is ushering me across the road. *rantover*