Only normal trial I haven't completed is Gen's. No way am I going to waste time pulling that shit off (especially when there's no frame of reference to properly learn it).
Besides, I never liked Gen. Screw him!
My problem now in SF4 is that I don't know who to play. I was somewhat tempted to play with Abel, and it seems he'll be my pick, but only because I don't have anyone else I'm really interested in playing. I was going to play Guile but his pressure game has been severely toned down due to his crappy flash kick and Focus Attacks that can take off a lot of Sonic Boom pressure...
I wanted to like El Fuerte too, but I dunno. Running around everywhere isn't my style. That's my gripe with the game (but it's purely personal, heh) that I don't have a character I click with. Usually when I play a fighting game I start off in the training mode with all the characters, learning their moves and seeing how they work, and it never takes long before I settle on someone I like. For Tekken that was Asuza Kazama, VF had Aoi, 3S has Makoto, ST has Guile... In CvS2 I play unplayed characters for the most part: King, Raiden, Todo, Rock. But SF4.. I still don't know who to play. Nobody feels natural for me
If you mean Normal trial and you have problems with the FA -> EX Thunder -> Ultra, you gotta cancel the FA with a dash forward before completing it. Took me a while to realize you could still cancel FAs after they hit.