Never got into Third Strike but whant I watch Youtube videos I can watch those all day. RX, Chinta, PinoAB7. It's art when you see the parries and tactical mind games.Excellent stuff. BTW...LOVE the music!!
Play wise I think SF2 Championship Ed was my fave because we could play as bosses and two people could play the same character finally.
SF4 is a close second.
I would have to say Street Fighter Alpha 2 for the PS One. I've played all the Street fighter games and never did I play any of them as much as I did SFA 2. Heck, I still pop it in every now then and get a few matches in with my cousins.