A lot of old games that I enjoy have outdated graphics. Doom, Marathon, Daggerfall, and a few others, all have gameplay that make them worth more to me than just the visuals.
Though, to be fair, these games were graphically advanced for their time. I can remember playing Doom back in the day and thinking how realistic it looked... my god.

Though I am not against graphic upgrades or HDing, or whatever. I loved Perfect Dark, and the XBLA release was just as good; the updated textures did not make any significant impact on the nostalgia of that game.
Now if only all those businessmen would stop squabbling and let Goldeneye 007 experience a similiar release...