My take on some of the characters:
Lorelei: Poor girl just has so much hell in her life at times, but she is just wonderfulness on a stick and I love her to pieces. She needs to keep herself away from Chris though. He's bad news.
Rory: Lovely little bookworm who began to open herself up socially after she started dating Dean. Now she's just a big slut.
Emily: There are times when Emily is just so incredibly cruel, but some of it I can understand because of the way her character is. In the end, she can be so hilarious and lovable too!
Richard: Richard can be incredibly nice or a real jerk. He's cool though.
Luke: He's the perfect guy for Lorelei. However, he has a lot of relationship issues he needs to workout before he starts taking everything out on Lorelei and their relationship.
Lane: Lane is awesome. I'm just disappointed that she wants to tie herself down with Zack, because she could do so much better.
Mrs. Kim: Mrs. Kim is the funniest character in the show. At first, she just seemed anal in a bad way, but now her attitude is absolutely a riot. I love her to bits.
Other Stars Hollow Peeps: These people are hilarious. I would never want to live around them, but they're great to watch.
Paris: They've turned her into a total joke now, but I really liked her character when she could be funny at times, but she was a still a serious character.
Dean: He's a pussy. I used to like him, but now I just hate seeing him around.
Jess: At first, I hated this little SOB. I wanted Emily to run him over. However, since Logan has been on the show, Jess doesn't seem so bad.
Logan: Rory is a total, toootal idiot for hanging around this guy. He is a terrible influence, and there is nothing redeeming about their relationship. I can't even find their relationship believable.
Other Yale Peeps: Boring as hell. These characters aren't aren't nearly as interesting as those in Stars Hollow.
Luke's Sister (forgot her name): She's nice, and funny, but she's an idiot for staying with TJ.
TJ: I just hate him. Completely. He's annoying, loud, gets in the way, obnoxious, holy crap.. I would love if they killed off his character.