Mixed up characters a little. Here's my thoughts...
Dhalsim is just ridiculous. Just learn his hitboxes and poke away. I'm not usually great at keep away, but he was bodying fools.
Lauren is fun and her meta is super-easy. Just keep up close and keep her projectile out. Everything else will come into focus.
Necalli is super-safe and hits for huge damage. His lack of range only leaves him with one bad matchup - Nash.
Nash is S+ tier. He's not Guile though. Take a step back and work. 2 full steps behind sweep range is his hot zone.
Zangief needs help.
R.Mika is really, really fun. I still don't know how to maximize her V trigger, but I was wrong about her. She kicks ass.
Ryu is best at sweep-range. I don't think he's a noob character or overpowered or underpowered.
Ken is great at combos and has nice pressuring tools, but he's wildly unsafe - making him the ultimate risk/reward character.
FANG and Bison are both mehhh, IMO.
Chun Li is tough to use, but she is very safe - so you can level up safely. Her ceiling, I'm not even close to yet.
Birdie takes some precision, but he's very fun. He looked like he was all about his normal, but his game is more rock-paper-scissors than anything else.
Karin gets in for free, but her buttons take some getting used to. Once you get her down though, its almost always your turn.