I always read various reviews/previews and everything I can on a game before I purchase it, if I haven't been following it for a long time. For a game like Freelancer, which I have been anticipating, I just preorder it because I know I'll be happy with it. To everyone who uses "warez" because they need to find out what a game is like first, do your homework! I have never been disappointed with a game purchase because I look at all the pluses and minuses and read thousands of words on a game before I buy it. If I don't like anything I read, I just don't buy the game, or wait til it's for sale at bargain prices.
I just end up playing demos until the game comes out. That's really the true test for me. If I am still interested and dying for the game after weeks of playing the demo then I know its going to be good.
"If this is what you want to do, you'll do it, no matter how long it takes..........and usually the longer it takes the more fun you've had!"