yeah, my old schedule (before becoming a parent) was this:
Work 8pm to 4am every night.
Sleep 4am-11am. Gym noon to 1.
Home from 1-8: Hang out with chick, shop, relax, a little work, the usual stuff.
Then 8pm rolls around, chick goes to sleep, and I begin 8 hours of uninterrupted work time. I loved it. I still work close to that now. There are a lot of distractions during the day. At night, it's work, tv in background, maybe netflix, and just kick ass uninterrupted.