Even though I loved the hell out of Tekken 3, I had to go with Tekken 5 cuz it took what made 3 good, and pretty much perfected it.
I never really liked Tekken 4, for some reason. Im not exactly sure why either. Just didnt feel the same, i guess.
I got such a kick out of playing Tekken 4 in the arcade, I wore that **** out. I haven't played much of 5 but it was also very exciting, although not quite so much so as 4 in my opinion.