play it now. Puts Diablo to shame. And its free to play and no initial fee to buy. Its currently in open beta but they aren't wiping the characters anymore so it might as well be launch. Here's the skill tree - its insane
Kind of a huge learning curve with the skill tree and the way gems work and links work. It's also really hard to respec if you mess up your character so it's best to follow a cookie cutter build for your first guy and you can get a bunch of good gear and skills for a new guy.
What did you make? I'm still not done with normal difficulty. I'm in act 3 on a marauder. Would be on cruel but haven't been able to play the past 3 days really. Stuff is really starting to pick up - getting a lot of skill drops and support gems now. Storing them and my yellows in my stash for future alts.