Northern Brewer, hands-down. They have sooooo many different ones, and they tweak the recipes over time, and keep adding new ones. I brewed an NB kit or two every week for a yr and always felt like there were more I wanted to try than I had time to brew.
Primary: Cran Razz Skeeter Pee
Secondary: Fake Sour Project, rhubarb razz and plain
On Deck: Saison with Fresh Citrus Zest, then IPA with homegrown hops