One reason why I went from PC to console is because of pirates. My change was only recently, well that's not true, I was actually console first then went to PC and kept up with both, but now only console. A big moment for the change is the amount of pirates now-a-days.
I really wanted to get Call of Duty 4 for the computer (which I would have had to upgrade my current computer) but I didn't have the money to spare at the time of release. Couple months later I read about how people that bought the game legitimately could not play it at certain times of the day because people were using their cd key. My roommate downloaded a torrent and tried finding a "good" cd key to use too but gave up after about 100 times.
Paranoid? Maybe, but that actually happened when I first bought WoW (which I quit after a year). It was the only WoW copy left in the store and when I tried to make an account, it said the cd key was already used. Luckly I was able to take it back and exchange, although I had to wait a couple days until they got more in stock.