I don't have nostalgia for anything, really, music, movies, games, etc.
For example, as a kid, I liked the NES TMNT games. Now, I can't stand them, and honestly, They were good games for their time, but I don't view things with rose tinted glasses either.
A lot of things I liked as a kid I don't enjoy now. For instance, Mario Kart. I liked it when it was new, but it doesn't hold that wow factor for me anymore, just like Mario Party, Smash Bros., etc. If a game is genuinely good and engaging, it can stand on its own merits and entertainment value, not desperate pleas from the depths of someone's childhood to hold on to a magic that was never really there.
New games can be good, as well as old ones. I actually prefer the old NES RPGs over the current top tier titles, not because I liked them as a child, but simply because they were fun games. They weren't bogged down with useless side quests after side quests. And yes, I know some people might get out the pitchforks, but Zelda 1 and 2, Majora's Mask, and Ocarina of Time aren't the best of the old Zelda games. A Link to the Past actually is far better, and I didn't play it until 10 years ago. The others I played as a kid and teenager.
Mind you, I am not disputing their importance to gaming history either far from it. They aren't bad games, but they just aren't the "god-tier" games people make them out to be. But yes nostalgia is, as Rick James said a long ago "a helluva drug" and it does blind people.