That's a great question! I'm really a 'variety is the spice of life' kinda guy, so really I like them all for different applications. I love having access to different strains simultaneously, and it keeps me from getting bored or tired of one. I switch up what I'm growing pretty often so things are always 'new'.
HashBerry - Great lemon-lime diesel smell and taste, not much in the head, strong body buzz, long legs (3+ hrs), not very sedating for an indica, great work smoke, medium-high potency, medium-high yield, slightly leafy to trim.
Island Sweet Skunk - Very unique lemon-peppermint-sage-citrus smell and flavor, potent and long-lasting high, mostly sativa, mostly in the head buzz, motivational and non-sedating, great daytime smoke for days off work when you can soar, medium-high potency, medium-low yield, slightly leafy to trim.
Super Skunk - Slightly skunky lemon-grape smell and taste with strong hints of coffee and chocolate, balanced high (both mind and body), great all around smoke, medium potency, medium yield for most phenos and very high for some, high calyx-to-leaf ratio makes this one a breeze to trim.
This is what I've found to be true. As a side note, my girl and I blazed 2 bongloads of the Super Skunk back to back a few nights ago in the Crusher and we almost couldn't stop laughing. I call it the 'back in the day weed', because it reminded me of the first few times I smoked. How awesome is that 16 years and one HELL of a tolerance later?!