Ak-48
Hindu Kush
NYC Diesel
Papaya
Just phased out Jock Horror, grew that for about 18 months. I like to keep four strains going, don't really have the space to deal with more than that. I experiment slowly now. I doubt I will ever replace the NYC Diesel or the Hindu Kush with anything else, but the other two slots are flexible.
The Diesels (3 plants) are on day 52. I have a mixed crop of six Kush/AK48 (2/4) that's at day 34, and a crop of all Hindu Kush that isn't flowering yet but is in the flowering cabinet getting bigger. And then I have a big veg cabinet (disguised to look more or less like a big dresser) that contains about 40 vegging plants of the four current strains.
Here's a pic of my veg box, about 18 square feet, with a low-profile eight-tube (each 54 watts) fluoro light, with all cool bulbs. I can keep around 48 smallish plants in there (using eight litter boxes containing six 1/2-gallon pots in each). There aren't that many in there now, because I just took six Hindu Kushes out to repot this morning.