both - morning because I can save time by showering, so that I don't have to rinse my hair and wash my face seperately and waste time when I can do it twice as quick in the shower.. plus it helps with waking me up loads
night because I'm a bit of a clean freak and find it hard to get comfortable if I feel dirty.. particularly if my hair is full of product etc.
i'll only ever have a shower at night if i've done something during the day that makes me dirty. tho sometimes i'll just wash my feet in the bath/sink b/cos i hate it when they're dirty lul
I take a shower as soon as I wake up. Sometimes I take a really long hot bath later in the evening.
Usually I just lay there and have a long drawn out conversation with myself until the water isn't steaming hot anymore.