I am going to have to say Mendo Grape(fruit) Kush from Ultra. Mine was originally a cut which produced a single seed; which the following year produced a single seed; which last year produced a single seed that I am growing as we speak this year. I could take pictures but I have a 2mp camera on my phone and it just doesn't do anything justice. The MGK is one BIG plant and just a pleasure to grow and smoke. Otherwise, straight from seed, Best plant would be Skywalker OG from Apothecary two years ago. See, Brett Bogue is a thief and that's actually why his genetics are F'ing REAL, m'kay, so I ended up with some of Brett's genetics from a guy in San Jose that sells seeds on craigslist. Man, that Skywalker was off the fucking hook! I do not and will not support Brett in any way, shape or form but in this case my best plant ever happen to be his genetics.