The only game I played with 3d on from start to finish was Mario. RE I had it on about 20% of the time. For the rest (NFS, Street Fighter, MGS, F1, Splinter Cell) not much.
I think one problem with the 3D is that it has no anti-aliasing. Games with complex graphics seem to simply look sharper in 2D. With Mario's cartoonish graphics, the 3D looked OK.







