KOCollins: NWN2, and Fallout New Vegas
Did you really have no problems with those? You must be pretty lucky, or played them pretty late after they came out. NWN2 has some pretty serious performance issues, and Fallout New Vegas needed a ton of patching before it was relatively stable. Alpha Protocol was even worse, though it's stabilized fairly well now too.
However, Dungeon Siege 3 was rock solid in the technical department, and I didn't run into a single bug. That was enough for me to suppress my doubts and go for the Kickstarter. Plus when you factor in that they're using a pretty user friendly engine, I'm pretty sure it will all work out for the best.
But yeah, I definitely get why people wouldn't back it, I almost just waited. But I caved at the last second after replaying the beginning of Icewind Dale, I really miss that style of game.