This is a pretty weak argument. I'm not sure why it still comes up. Isn't it accepted knowledge by this point that certain "eras" of games, and certain games in particular, aged better than others?
I tried playing the original Deus Ex before HR came out, and I couldn't really do it. Too clunky... too dated. Things like inventory management, feedback-less stealth, INCREDIBLY bad voice acting, etc. I just couldn't get into it.
This summer I also played Halo 1 for the first time, a game released just one year later. And I played through it just fine. It aged nicely.
This doesn't mean I am claiming that Halo 1 is "better" than Deus Ex. Games are a reflection of the time period they came out.
Fans of specific old games FLIP OUT when someone says they couldn't get into something retro but... it's nothing personal. Like... I couldn't get into Deus Ex, but I don't think the game "sucks." Video games have just moved on, and DE1 was just too hard for me to enjoy. If you played it when it came out, I understand it's still awesome.
Example: I played Zelda 1 on the NES in the 80s. So I still think Zelda 1 is awesome. But I DIDN'T play Metroid 1... started with Super Metroid. So I had a very hard time going back and trying to play the original. This is not rocket science.
These sorts of discussions always devolve in the exact same way:
1) People will be insulted and say you have "no taste" and only like your "dumbed down modern shit" if you say you didn't like bombing random walls in Zelda 1 in 2011, or didn't like Deus Ex 1.
2) Someone else will come in and claim THEY played the game for the first time this year too, and liked it just fine. So something is wrong with you.
3) Some folks will actually understand, and agree with you.