Well, I'm among those who really...pretty much....hated...X-2. Though I'm not going to go saying anyone's an idiot for like the game. We are all entitled to our opinions, and I like quite a few things that other people don't.
Anyways, I think a X-3 could be interesting....but not really with the same characters. Maybe something in the past, that centers around Xanarkand...the scenes in Xanarkand back in the beginning of X are pretty cool and I've always wished I could explore that city a little more. A prequel about the 1000 year old war and the rise of Sin could be fun! Not that it would happen, but I can dream....
