Well, every weed you get is going to be a specific strain. You're not always (if ever) going to know which strain it is. I doubt many people who grow even know what strain they're planting (i.e. a lot of commercial imported Mexican). Some popular strains are purple haze, blueberry, bubblegum, bubbleberry, train wreck, green crack, AK-47, durban poison, jack herer, northern lights, humboldt, etc.

Regardless of strain comes quality. You basically have schwag, mids, and the quality weed. I don't call it chron or whatever because chronic is an actual strain too.