Sorry if this topic is already up, but I didn't see a similar thread. So who is your main fighter in SSFIV? At the moment, I'm doing real well with Sakura because she's like Ryu and Ken except (from what I felt) faster and had much more satisfying combos. Plus her Ultra combos are decent enough.

My new main is Balrog, with E. Honda a close second. I just like how I can punish any "jumpers" with my uppercut combos.

Sakura

Juri or Dudley, I haven't decided yet.

Cammy and Sakura.  
 
training Makoto too. so i guess her as well 

I've actually been playing a lot of Guile recently, and doing really well :D

general discussion glitch for the win  
 
Anyway, I'm going with Juri/Ibuki, their fighting styles just really fit my playstyle and it just feels natural to play as them.

Cammy, but I like to use Cody now too.

T.Hawk is a lot of fun. I haven't picked anyone specific yet, but I find I keep going back to Rose, for the most part. I liked her in Street Fighter IV and I still like her in this iteration. Close second is Sakura.

Cammy used to be my main in SF4. I guess she still is now. But I find I'm not doing so well with her now as once was.
Probably looking at trying Abel or Juri instead, see how well I fare with them instead.

I like using Fei Long and Cody. Dan also works if I'm bored.

I'm actually not sure at this point. In vanilla SFIV I played a lot of Ryu, but I don't really consider him my main anymore. I also play a lot of Seth, Balrog and Cody. I'll get back to you.

I'm still pretty Noobish so I play a lot of Ryu as his combos are the easiest for me to remember, but I'm pretty interested in Juri after a brief try on her challenge mode.
 
I also have a passing intrest in Guy, Fei Long and Ibuki

I've taken to Sagat for some reason with SSF4, though out of the new characters my favorite is probably Juri...if only because she's pretty spam-friendly. I've gotten into some really frustrating matches against her though; if someone can get you into a corner and just spam that kick attack, it can be hard to get yourself out if you don't have a charge character to counter with. But I'm also reaaaaaal low-tier, so I might just be missing something.

Ken, getting decent with Fei Long,  and okay with the boxers.

I like Sagat and Juri.  I cheap out with Zangief.

Ryu.  I don't care about the stigma that comes with it, he's good.

C. Viper use to be, but now I'm starting to use Sakura and Juri.

Ken 'til the end, but I'm trying to pick up Makoto and Guy while I level him up. I think a change of perspective has helped every time I've been in a rut.
 
Edit: My post...
 
KINDA FUCKIN' RHYMES!

Fei Long, El Fuerte, Hakan, Guile.

Makoto and Cody, nice mix of characters, stops it getting stale.

Zangief

Juri.

Sakura. I'm not very good so I wanted to stick to someone of the same mold as Ryu (I forget what they're called). Plus, I just find her to be an endearing character. She's still learning, just like me :P

i like Gen

M. Bison. Although it's a bit of a pain right now since I keep dropping link combos while the shoto on the other side is mashing away dragonpunch. =(  
 
I like using Cody, but I ain't any good with him either. I'm alright with Juri, but only because people can't handle my spammage yet.

Guy, Juri, Sakura I suck with all of them..

Still maining the King (Sagat)...Considering branching out with either Cody, Dudley or Adon as they all feel very different at this point.

I usually main guile and dan.
 
Right now I may add t.hawk due to the substantial changes to how he plays, I also like how dudley plays too. But for ranked matches I'm sticking to guile for now.

Honda technically since my Dee Jay sucks too much to be my main :(

Balrog. Messing around with Dudley too.

" Sakura. I'm not very good so I wanted to stick to someone of the same mold as Ryu (I forget what they're called). Plus, I just find her to be an endearing character. She's still learning, just like me :P "

I have latched on to a few of the new characters.  Juri is awesome.  So is Dudley and Guy.  Still like C. Viper and Cammy, too.

Iduki, also messing around with Makoto.

Vega all the way.  Wall-dive shenanigans all day.

Balrog. Alt almost everyone from vanilla.

Super SFII Turbo HD I main Balrog, likely always will. 
 
SFIV I mained Balrog. 
 
Super SFIV i've currently only played Guy, but will end up maining either him or Dudley.

 Sagat

I've been jumping around a lot.
I started with Zangief and Dan originally, and actually got pretty good with them. 
Then I got a TE fight stick and started using Guile and Chun-Li. Many ranked wins with Guile.
Then about 12 hours before SSFIV was released I did all of E.Honda's trials and went to sleep.
Woke up, bought SSFIV, did all of E.Honda's trials a second time, and went online and smoked many a fool with him over the past couple days.
Been attempting to use makoto as well with little luck.
 
The end result is I am kind of terrible with everyone but E.Honda who I am sorta okay with.
Unfortunately I can't complete the simplest of combo's involving quarter circle motions anymore because I keep playing a stupid charge character, which I ought to quit doing for good.

I mained as Juri; out of particular interest in her taekwondo fighting style. I'm looking into the direction of Ken and maybe Dan as possible alts.

I've been main-ing Cody with a side-order of M. Bison (Dictator). Use a standard 360 gamepad, too. I'm also doing pretty well. I tend to win roughly 85% of the games I play, despite the odd bouts with lag. 
 
I've been thinking of using Hakan as well, if only to laugh at his oily moves.  
 
Side Note: I'm loving the sheer variety in characters I'm doing battle with. I've only run across one single Ken in the past few days (roughly 15 hours of playtime). Sometimes I get my ass kicked before I figure their play style, and sometimes I just get righteously pwn3d. I guess all in all, I'm loving the sheer diversity.