I use all three frequently and like them all, but I think I tend to gravitate most toward the Kalita Wave. Or, rather, toward the December Dripper now that it's out. I like flat-bottom drippers mainly because I can either really focus on my technique and pull out some nuances from cup to cup, or I can just sortof wing it and still get something tasty. I don't think I could say the same of a V60. The December is quite nice because it adds some extra versatility over the Wave, as it has adjustable flow rate.