Sometimes you see a game and you just know you want to get it, but you don't know anything about it. You buy it and to your surprise, you end up loving it more than you thought. In my experience this has happened a few times, however some impulse buys I end up regretting... others, turn out to be amazing.
My best impulse-buy was definitely Dragon Quest VIII on the PS2. I saw it at a Game Stop for $8 2 years ago and it's now my favorite game. A runner up would be Final Fantasy X (not the most popular FF, but still) which ended up being my 2nd fave game XD
So what's been your best impulse-buy game? If you don't have one, what's your worst?