“By it’s very definition, Glee is about opening yourself up to joy”.
I have completed a marathon on the first season of Glee. What was the initial target of only watching episode 5 on Sunday night turned into a straight non-stop visualisation of popular songs and awesome dances with cool themes and abundance of moral take-aways. Overall, I cannot express in clarity of my enjoyment in watching Glee!
I have heard that many people compared this to High School Musical (HSM). I must admit that the similarity of musical-themes and of high school setup does make it worth being compared to one another. But the differences are huge as well, and we can see that even at the cast selection. The diversity in Glee is apparent. So, the majority has spokenth: Glee is far better than HSM. And I concur.
Now I’m trying my best to poison the minds of many with Glee. And waiting in agony of the next season, if there’s any. 
Post-edit: Apparently there’s more then meet the eyes. I’ve watched up until episode 13, but season 1 is until episode 22 – 9 more episodes will be aired come March 2010 onwards. Can’t wait! And they have confirmed that there’s season 2 on the slate. 