Stop, look, and listen. Or so mother knows best.
Foot in mouth, make duck look delicious.
I do believe people have gone over this before. Yes there is a verscimilitude of people coming out with poop, and its replacement, crappy poop. But there are still some quality games coming out. Call of Duty, Sphinx and the Cursed Mummy, Knights of the Old Republic, (there isn't anything good coming out on the PS2 though, ever, again) Battlefield 1942, etc.
So, like a plow through snow, you should keep your dol-lars in your pocket, let it waft for a while, and then, when someone comes out with a good game, and you know what good is, then you get it. (Wow, that was a lot of commas in that last sentence) Plus, like restaurants, developers find winter a bad time to release good stuff. Summer/fall would be your best bet when the goods, being replacable, come out.
I'm sure I've added nothing special to this, and others will probably come up with better stuff. But that is what you get, from me.