I am playing Quake 4,which i have never played before and jericho on max settings.I do tend to get bored playing twice although i have reinstalled Bioshock which i can now play maxed out on my new pc.
I often wonder if i should wait a year or two after a games release before purchasing,so that i can play it as it was intended.
The problem is that when a game comes out i want to play it now,so have to compromise on graphical quality slightly,although i believe gameplay is more important.Buying games that wern't quite good enough to justify full price at the time but are great value a year or two later is one way to get the best out of your system and still enjoy a new experience.
I played max payne 2 again recently(how olds that) and the graphics with all settings on full was amazing even now.I first played it with my 32mb graphics card stuttering like Gareth gates during his stage debut.
There certainly is something to be said for replaying old games on a better system.