I usually shave in the evening, once the little 'un is in bed. The only rel exception is when I have been running or cycling. Then I tend to shave during my shower when I get home, so the could be any time of day or night.
Evening shaves are less rushed than morning shaves for me. This means less chance of a rough shave, and more opportunity for my face to recover before work if something goes wrong. It hardly ever happens, but Sod's law says if it does it will always be on the worst possible day!
By the way, I have found that it's good to shave before going swimming. The chlorine, I guess, works relly well after a shave.