Hrm, considering some of the games I've bought at release previously...
TOR TSW:Lifetime sub Duke Nukem (god I'm an idiot) COD:Black Ops 1 (fuck that game was crap)
The amount of money I'm risking on KS is relatively minor...
So far my KS/pre-support list is:
Wasteland 2 Project Eternity Star Citizen/S42 Grim Dawn
Oh yeah, and I bought Minecraft in alpha (turned out to be a pretty good deal as well).
The first three are all based off games that were major features of my young gaming life. I don't think you can recapture the original feeling of playing some of those titles, but the calibre of the people making them is hard to fault.
Crowfunding is a grand experiment in democracy. We're so sick and tired of all the consolised or neutered crap with flashy graphics masking shitty gameplay that get's peddled, so someone has given us another way to vote with our wallets. If it works then we may actually start to see big production houses returning to what made them big in the first place, ie. producing good games.
Of course if the big KS's fail to materialise, I think you'll see the end of crowdfunding. These guys have taken not just the burden of meeting their 'investors' expectations, but quite literally the burden of changing the face of the gaming industry.