I like to scratch build profiles, and play around with design perameters. I tend to not keep any one plane around for to long. I'll fly it for awhile and then build another to try and improve on my designs. So I have a bunch of them laying around, but I also have some gas powered IMAC planes, and a few sport planes from 40 size through 1/4 scale. I think I fly the profiles and the gassers the most, though. They seem to be similar because of the 3D thing......