I rarely get 8 hours at a time, and I'd actually prefer it that way- 6 is about my perfect amount, and I usually get that from 4am to 10am, after I get off work at 3. On rare occasions, I'll have what I have come to call my "Coma day", where I'll sleep for 10 or 11 hours, but that's usually when I'm not feeling 100%.
H