GTA IV, Fallout 3, Dragon Age Origins were great games but all needed extra registration through an external online service on the PC and with all of these I've had tons of issues downloading content. logging in, being able to actually play etc.
Although I bought these games, I had a harder time getting to play or update the game than someone using a cracked/warezed version. Good games, mediocre or bad service.
I am actually quite worried about SW:Tor after the disaster I experienced with Bioware, their support and this whole Bioware Online/EA Account Online thing that just was a huge hassle.