I worked 6PM to 2AM for two years. It was a damn good job I wouldn't have had otherwise. Only downside was trying to make friends in a new town while working that, but it's been over 10 years since I was in that job.

Since I've been in my 30s, I can't sleep late anymore. I can go to bed at 3am in the summer and I'm up with the sunlight at 6. I actually like it though. It's great for travel too. Want to hit up sightseeing type places? They are abandoned at 7am.