I'm on a ten point scale, though I may go back to grades this fall when I re-enter academia. I probably over-estimate most movies, and I think 8 is probably my biggest category. But I try to watch good movies most of the time, so when they end up being good, I'll give them an above average grade, which means above a 7, which means an 8 or more. I guess I match up with pix's categories pretty well, especially how a less-good movie with great parts can get the same grade as a good movie that doesn't really engage me at all.