Recently I've been playing Street Fighter III: Online Edition. Though I'm not even close to being great, I still have a lot of fun playing it, which is amazing since it just hit me that it originally came out back in '99.
I got a hold of Super Street Fighter IV because I didn't have a copy and I remembered having a good time playing SF IV when it was first released in 2009. Luckily I didn't have to pay for it either, so I nabbed the Arcade Edition DLC for $15.
I can't say I share the same love for SSF IV as I do SF III. Mostly because it spends way too much fvcking time wasting yours; while I appreciate the graphical feats of the game it's just frustrating to watch over the top animations over and over and over and over again while I'm fighting. That and when you win or lose you have to wait for a rather long-winded victory pose, let it save, and then you can decide what to you wanna do after a match (this only applies to online by the way).
SF III on the other hand is far less frustrating because battles go by quickly and there isn't an onslaught of people that do literally nothing but spam fireballs and do wake-up ultras. IV is boring in comparsion to III in almost every way; the only upside it has is the bigger roster, with all of the classic characters included. But that's simply not enough for me to look over time wasting bullsh!t when I want to experience fast paced battles and be able to search for the next in a heartbeat. There's also an overwhelming priority system in IV that's not so prevalent in III, so there's a load of nonsense that goes on that you have to mentally prepare yourself for.
Maybe I'm just biased because I've been spending so much time with III for the past month or so. Either way, IV still puts way too much effort into being flashy for my liking.