Sativa's are mostly heady. Makes you want to get up and run around. Indica's are what you want. Many strains are mixed with both. AK-47- 48 are suppoesed to be potent shit. White widow will do you too, I just tried some that would lay you out on the couch. Right now I'm almost finished with more papaya. Just ran out of the last. It was like crack on a stick. You smoke one and say to yourself damn, I could stand just a few more hits and then BAM. You can't think straight for 3 or 4 hours. It will lock you down. I got a strawberry chough that is going to be a mother i hope . It's some bang stuff they say. Go for the indica's they are stronger but alot are mixed strains these days. pick one and let us know.