Path of Exile
 

If you liked Diablo or Torchlight, you'll love this one. Very open skills tree, lots of random drops, various monsters, typical quests.

Warning: it takes forever to load the first time. Let it run, and when it finally comes up, you can get in fairly quickly. It only does that the first time. It also requires about 5Gb of HD space to load everything.

Free to play. Open beta, with no more character wipes. Amazing graphics.

Try it!

wont lie it was fun, but got boring real quick. i think i burned myself out :S i did like the skill system tho. also AION is free now :D