Street Fighter II turbo on SNES, my favourite version of the game.
(I like super SF2 much less, and the megadrive/genesis versions suck)
Later 2D fighting games are full of combo hit counters, flashing things, special bars and crap and seem to have a lot of combos/special move/crap that you have to learn to gain an unfair avantage on your opponent.
And I played a bit of marvel vs capcom 2 on dreamcast, that one is both quite extreme with the amount of flashing stuff and combo crap, and easily dealt with by smashing buttons and doing random hadoken-like moves that triggers "spectacular" special strikes and characters end up 10 meters above ground.
well, I've said enough
3D fighting seems another genre, had a bit of fun with yoshimitsu and its blade in Tekken 1 and 3, that's it. 3D fighting has that delay between button press and effective punch/kick, much less annoying than 3D tennis games, but still I don't want to deal with it.
as for mortal kombat 1 and 2, they were kind of good in the times but if I try to play now I either laugh or cry
. they got old and ridiculous. that Dragon Ball Z 2 fighting game now sucks as well.