I feel differently. I'm pretty much on a 4 day split but during my rest days, I feel antsy and really want to go. 6 days/week is quite a bit though if you rely on making it every single time to hit each group.

Right now I'm experimenting with hitting muscle groups about twice a week. YMMV though. Best thing to do is try it and see what you think, then modify from there. My biggest problem hasn't really ever been my routines; it's been getting sick (which was a big problem late last year into early this year) or feeling too busy to work out (which is pretty much a cop out).