Original Comment by: Slartibartfast
The closest I've ever come to that sort of addiction was with Diablo 2. It was a combination of trying to hunt down all the items I wanted as well as creating the perfect character. To me, that meant a character you could work all the way through Hell difficulty with, by yourself. That means being able to do a variety of damage types (because of all the monsters with immunity) but still doing enough damage that you can actually kill things. To me this was much more challenging that just making a PvP character who does as much damage as possible, because with that there was no balancing act. After awhile though this became work, and battle.net started to hate my CD key, so the last three or four times I tried to play it wouldn't connect anyway. I guess I should be thankful.