I must admit, that if you watch it with a loved one, and tune out the poor secondary characters, the confusion of why they are even in the movie, and a lot of cliched jokes/situations spread throughout, then you might just find the heart of The Kids Are Alright.
Also, be warned that this movie has way too much Mark Ruffalo backside in it. I still question that Academy Award Nomination. Not the backside, but the whole character. Not that he did a bad job, but I think that his character was pretty ordinary and boring. There was nothing at stake for him, at least he acted that way. In the end, it all... well, you can watch it if you want to.
So, my overall decision? It could have been Best Picture material if more time was taken to raise the stakes for everyone involved, aside from the couple. Even though it was erroneously nominated for Best Picture, it would have stood a chance with a little more care. This was a very important subject, which a lot of people would respond to. I thought that they missed a golden opportunity to tell a touching tale, and instead seemed to expect people to be effected by it just because of the content. They assumed that it would work. They should have worked a little harder at it.
Still, upon further review, this is a worthwhile view. Though I must warn you that there is a lot of needless nudity and crude content.
And, once again, this is just my opinion.