Yeah definitely don't get me wrong, some games are just as fun today as they were back then. On the other hand, 2D graphics on consoles like the NES have aged far better than 3D from when the industry was just beginning to move to mainstream 3D (Jaguar, 3DO, PSX, N64, Dreamcast).
I also really like the idea of "new to you" games. There's a lot of games I played demos for back then (I had a LOT of demo discs that we got from Toys R Us, Pizza Hut, PSX Magazine, etc) that I never got to play the full versions of that I have played recently or plan to in the future and really enjoy now.