I'm a big fan of the Shiva...personally.. I've tried a number of official strains over the last year... M39,Ak47,JackHerer,WhiteWidow,BlackDomina,Ultra Skunk,NL#5... the list goes on..

Out of them all, i'm really not sure... i really enjoy the indica dominent strains...50/50 and up.. the 80/20's are my fav.
I enjoy the couchlock, kick your ass stone.