Well, for starters, anime is a form of Japanese art...

The most painful moment is when they ask "Isn't it a cartoon?"

Ha yes

My friend is obsessed with anime and watches it a lot...A LOT. I only just started watching K-ON which is actually pretty good.

I'm not as obsessed with anime as my friend is... the only anime I ever managed to compete is Angel Beats, and yet I'm still trying to watch Your Lie In April.

My friend, meanwhile, has watched a LOT of anime, his favorite being Madoka Magica.
He's even watched hentai, which is what I tend to stay away from

Yeah same my friend is super obsessed with anime. I don't know what her favorite anime is but she really likes it. I only watched barley one episode of K-ON but it seems really intresting.

Is K-ON still good?

I think so.