Low-to-med, I can see a clear distinct difference; med to high, meh.
I didn't spend this much money on my hardware to run games on low or medium. Only game I've run into that I couldn't turn everything up and run at acceptable fps is Metro 2033. I might turn down AA to something like 2x but everything else max.
Low-to-med, I can see a clear distinct difference; med to high, meh.
It bugs me when a game doesn't look as good as it could.