xx = cancel the previous move's animation in order to make the next move a part of the same combo.
180 on the current version and on the original version 50 hours spent, and I'm still pants at Street Fighter 4: Super Ultra Gold The Movie Edition: Director's Cut. I just can't do almost any combo consistently, or at all. I can do really really really simple ones like jumping m.kick crouching m.kick xx EX Hurricane Spasm, and maybe once in a blue moon I'll somehow pull off: jumping kick of some sort, 3x l.punch, m.kick xx Hadouken xx Super. Yes, I know jumping in a lot is bad. Oh right, I'm talking about Ryu. I can't even play the easy character! I would like to painfully crush shake the hand of any dev who designs their fighting game with lots of 1 and 2-frame links. Well this game requires 1-frame links to do good combos, so I guess I'll just resign myself to an eternity of failure right now.
I have a full-time job, and there's way too many other games I want to play. So, the unfathomably large number of hours it would take me to commit those 1-frame links and FADC into ultra combos to my retarded muscle memory do not seem worth it.
The game's still really fun though, and I can beat people who are new (wow, I'm so cool) or even sometimes significantly better than me, because they don't know how to block. Like I've beaten Akuma's who--when they managed to hit me--did 12 hit combos on me. But I'd win through attrition by using 1 to 3 hit "combos" on them all the time, because they don't understand Street Fighter's blocking system. Learning how the fundamental systems work early on will help you win against other new players, even if you still suck at execution.
Note: It seems I vent a lot on this site. I actually do like most every video game I play. I've been jokingly told in Vent when discussing games, "fuzzy, your opinion doesn't matter, you like everything." So don't hate me for not liking things, because I probably do actually like them when it comes down to it.