Let me say this first: I do like Glee. I watch it every week, and I do like the music, for the most part. It's nowhere near the worst show on TV, but far from the best.
I'll agree with the majority of fans and say the Season 1 is my favorite. Season 2, I think, started out good, but the plot started to unravel, the characters started to fall apart, and there was way too much anvil dropping. It seems like RIB has seen their mistakes with Season 2 and they're starting to fix them, although I can't say how well I think this is going to go.
One thing that annoys me about the show is that the writers keep pushing aside the underdeveloped, albeit interesting, minor characters, such as Mike, Artie, and Tina, in way of the rather bland Rachel, Finn, Will, Emma, and Sue. Kurt started out a favorite of mine, but I think he's getting way too much screen time. I used to like Mercedes, but her development in Season 3 is just... blargh. Blaine is also one of my favorites, but I think his character's been Flanderized way too much. I mean, it took Mike three seasons just to have a plotline.
(And, I will say, it was excellent.)
The music, for the most part, really is pretty good, though some of the song choices I don't agree with. It is good that solos are more distributed now, although Rachel still does get a bit too many. All of the singers are at least decent, and although Cory Monteith probably still is the weakest of the cast, he has improved a lot.
I wish there was more variance in the songs, as in choosing some songs that aren't oldies/pop/showtunes, just once.
Also. The GayAesops
. I'm sick of them. I mean, I do understand that it's a big issue, but the amount of coverage, honestly, is too much. I also wish they would potray high school a little more realistically. As someone who also comes from a small, conservative town, I can say that high school doesn't usually work that way.
So, overall, Glee is a decent show. Not the worst out there, but really not deserving the amount of love it gets.