Oh, well I'm originally from Southern California and I had gotten my medical card a little after I turned like 18. I got to walk into medical clinics and get the type of bud I wanted whether it was sativa or indica. Oh man, you got to hold it under lights and microscopes and check out the hairs and crystals. They'd let you break the nugs to get a good smell and if you didn't want it you picked another. Hell you could buy up to pounds if you wanted to. It was awesome. You got to buy 15-25 dollar grams and alot of the times they'd work with you if you didn't have alot of money.
AK-47 is a good strain, I think it's mainly an indica strain though. Indica of course represents the downer "night time" medicine as they called it. Gets you hungry, makes you sleepy, the works. Sativa was my favorite. It was the upper of the two. Didn't make you as hungry, best before work or school, and always made you laugh and crack up to anything. Hybrids are good too though.
My favorites are G-13, Bubba Kush, OG, and green crack. All mainly sativas but I think a couple are hybrids.