You really do have to get to know the characters - it gets into a great storyline as the series progresses and the story is quite dark as a stark contrast to how you might think the story would be. The musical numbers are also pretty great!
As with all good shows, you have to forego constant entertainment for the first couple of episodes to build up characters, otherwise you have a storyline that affects characters that nobody cares about.
Shue's wife is annoying but I think she plays the part well, Quin is HOT and I think she's actually the best character although Rachel is made out to be. She's very good as well though, and fit.
Finn plays one of the best male parts I've seen in a while - totally believable.
Also, the show makes light of disadvantage such as Artie in the wheelchair, tina's stutter, cleanliness OCD and teenage pregnany, there's a lot going on - everyone loves a good underdog story as well.
To the haters, give it time, you just might get to like it.