I'm about to do my third all grain tomorrow morning. My first all grain I brewed early in the morning I was well prepared and everything was well planned, didn't have a beer until I was past the half way mark. Beer turned out great.
My second one was in the evening, I'd been drinking all arvo, still had a blast and made beer but it was a messy process. I forgot a few things and a overlooked some notes, spilled shit everywhere and broke my hydrometer. Beer still turned out surprisingly well.