sativa when i need to get chores done, go to work, drive, or get through the day.
indica when i want to zone out infront of the t.v., when i am bored, need to sleep, the middle of the night.

personally i like indica because when I smoke sativa strain all by myslef, i cant find anything to do and get bored and fustrated. sativa is better for smoking with friends, and i mostly smoke all by my lonesome