Depends on my mood and what I'm doing. I really love the feeling of a pure indica but they tend to knock me out. If I've got somehting to do I always go for a sativa.

Speaking of indica/sativa mixes, I just picked up some blueberry crossed with an unknown sativa that's really a nice smoke. All the potency and great taste of a normal blueberry but without the traditional blueberry heavyness.