I shave twice a day. Normally before work at the gym, after my work out and then again in the evening before bed.
I think my heads pretty tough so I don't suffer with rashes. I like the smooth feeling and by the evening I tend to have the sandpaper feel back on my head. I like feeling the just shaved feeling on my pillow too.
When I was sick last week, I notice and others commented on how quick my hair grows (it starts further back and there is a hole on the crown but the rest grows!) So keeping smooth is a full time commitment!