Purps always seem to be in high demand but also:
og kush
trainwreck
silver haze
northern lights
university (or universal) kush (forget which lol)
Some mech is down in sd too.
mech=no bueno
a lot of it is grwn in norcal.

But of course everyone has their preference and a lot of the time people come up with these crazy ass names for product that is obviously a pre-existing strain.