For me, about 10:00 is good 'cuz often the 'rents are asleep by then. Also, the urge for weed nap coincides with the time I'd usually be going to bed anyway. On these occasions, I usually go for a good strong indica.

For a lazy, non-productive day WNB, I like a good indica/sativa blend.

For a night on the town, around 5:30 or 6:00, I like a nice up high sativa.