For me it'd have to be racers. I can go back and play through FPS campaigns a second or third time, but games like NFS are usually a once play through and then maybe, just MAYBE i might pull it out again and do a couple of runs.
Thank god they come out with new NFS all the time though, because racers are one of my favorite types of games.
Ok, when we speak of "age fastest" are we referring to a game that people won't be able to return to they played, OR one that, in future years new people won't want to play?
I was taking it to be the later. HOWEVER, if it is games I wouldn't want to return to, anything linear would likely end up not aging well.