Oh, I'm well aware that tons of people love throwing around the nostalgia card. I was specifically referring to examples like agesboy's and Haguile's, where the nostalgia card gets played even though it would make no sense for nostalgia to be involved.
Sort of a reverse example:
Since I grew up during a time when all SNES-owners were honor-bound to hate Sega, I didn't own a Sega console until the Dreamcast.
I've heard fans of the 3D Sonic games (particularly the early ones) defend them by insisting that everyone who doesn't like them is just high on nostalgia for the Genesis games. I didn't play the Genesis games until years after playing the two Adventure games, and even without the comparison I thought the latter were mediocre at best and that the former were pretty good (though the only one I thought was truly stellar was Sonic 3 & Knuckles).