1. Will Schuester
"Oh William I wouldn’t dare lean on you, there’s so much grease in your hair I'd probably slide right off."
"I just lost my train of thought because you have so much margarine in your hair..."
"Hey, buddy. Get a haircut. It looks awful."
According to this article I found though, the actor playing Will, Mathew Morrison, doesn't actually use product on this hair. I have to admit though, It never looked like he ever had much gel or anything in his hair to me while watching the show.
I love that sue makes jokes about his hair, reminds me of me, if someone has bad hair they deserve to be made fun of. Having said that, personally I don't think Wills hair is THAT bad, Its not great but its not embarrassingly bad. I think I'm just not a fan of how short and curly it is. Its also an annoying colour, that shade that doesn't really seem to have a name. Its a brown with coppery-blonde tones in it so it changes colour between dark brown and dark blonde depending on the light. How annoying.
2. Quinn Fabray
short though. It made her look a more stylish and less young.
3. Tina Cohen-Chang
Tina has long brown hair. However at various points during the show she changes her hair various ways. She gets blue sections in her hair, either by extensions or actually dying her hair (I don't know which). I think she has also had purple sections in some episodes. Another look she has had is when she dyed he ends of her hair a slightly lighter brown in an ombre style. At some point she also get a full fringe, I don't really like this, she looks better with longer layers and a centre parting I think. The different coloured bits are quite cool as well I guess.
4. Noah "Puck" Puckerman
I love puck, well I did until he became obsessed with Lauren the fat wrestler in season 2, I thought that story line was just a bit odd. I still like him though. His mohawk hairstyle is quite famous on glee. As a general rule, I do not like Mohawks because, well, there stupid. However, I think Puck has brought me around a little. Apparently for season 4 he has shaved it off according to this article Gutted, but he has said in the past he doesn't really like his mohawk, so its good he's finally allowed to get rid of it. :)
Thats all I am going to do for now, I may revisit Glee hairstyles at some point and talk about some of the other characters later.