I do a 7-3:30, but lately it's turning into a 7-5:30. Too much stuff to do at the end of the day, and people always look at you like you're bailing in the middle of the day when you leave at your normal time.
That's the only sucky part. But honestly if I leave my house any later than 6:30, my commute will go from 25 minutes to 55 minutes. Funny how traffic works.