watch "Spring Awakening".
I had never heard about it until I found out that two members of the TV show Glee (Lea Michele and Jonathan Groff) were the main characters of this musical which seems to be fantastic.
Another musical I would like to see is "Next to Normal", I guess it deals with family problems; just seen the Tony performance on Youtube and I think it might be very moving.
This leads me to think about the latest version of "Rent" in theatre, the one with Vanessa Hudgens and Nicole Scherzinger. I've seen a few videos on Youtube and I was horrified by the way Hudgens ruined the musical with her performance. Out of tune, out of key, completely wrong. What surprised me was the performance of Pussycat Dolls's leader who played Maureen. Great interpretation! Different, of course, from Idina Menzel, but still funny and unconventional!
Anyway, the old cast is the best.
Just look at this: