It partly depends on whether these are start end times, both or what.
I worked a 5am start monday to friday for seven months. If you can avoid it don't do the early start. As mentioned it screws over going out. To add to that it means you have to be in bed early every night and just want to sleep through the weekends.
If I had a choice of 6am or 8pm starts I'd take 8pm every time - and I have. I now work the closing shifts at work. The extra plus is that as I knock off at 10:30pm I can go out afterwards and its all good. Furthermore I can do nine hours on friday, go out get home at 4am, sleep till midday, go to work again and do another nine hours, go out again, get home at 4am again, sleep till midday on Sunday go to work for five hours and have a quite sunday night in front of the tv.