Glee Plea

Glee seems to be very popular at the moment. The thing that intrigues me the most about its popularity is the range of different people who seem addicted to it – it appears to have almost universal popularity.
I've seen a few clips from Glee and didn't understand what all the fuss was all about, but I decided to watch an episode to give it a chance. I was very disappointed.
I have nothing against Glee. There is nothing there that offends me. But equally, there is nothing that is particularly commendable. I was firmly indifferent.
This is a plea for someone to explain what all the fuss is about. Two close friends have attempted to explain it to me. Their explanations included the following (my responses in brackets):

• It's very funny (I disagree – from what I've seen, it has the occasional amusing line, maximum. Is it just not my sort of humour?)
• It is an excellent mix between high school musical and Scrubs (maybe – I can definitely see HSM in there (personally I describe Glee as HSM on TV; however, I dislike HSM), and the style has similarities to Scrubs (but then, I haven't seen much Scrubs – of what I have seen, some is genius but much is unremarkable))
• The music is very good (I disagree. The music is not good. It's very much towards the poorer end of 'musical' music (however, part of the problem here may be that the songs are covers of songs I don't even know...having said that, I don't think I'd like the originals anyway))
• The mix of high school drama and random musical-ness is very entertaining (no it isn't, it's just unconvincing... American high school drama is 99% annoying, trashy musicals are 95% annoying, and the mix isn'treally any better - it's just quite silly)
• It's not to be taken too seriously (I understand that, and acknowledge that I have a tendency for hypercriticalness. But I still see no merit in the show.  If it's not a serious show, surely it should be entertaining...many people seem to find it so, but I don't understand why)

As far as I can tell, Glee is just High School Musical in series form. Part of me assumes I'm missing something – am I?
Someone, please explain what all the fuss is about! Although I don't watch things like 24 and Scrubs, I can see why people like them and I can acknowledge their merits. But Glee seems much more like Doctor Who – essentially unworthy of TV time.