Pfft. Loser. You gotta stop that, before it wrecks you sleep cycle for school... And start getting your butt online during the day... *gives said butt a swat*
Depends on personal preference...
I shower in the morning- helps wake me up and my hair is horrid if I go to sleep with it wet.
My mum showers before bed- wash away the day's guck and relaxes her, or something.