For me it has to do with aggravation. I love to build. The problem I have is there are very few kits available and most of them aren't what I'm looking for. The LHS will order anything I want if I can tell him where to get it. About 5 years ago I wanted to build a Cap. The only kit was the Lanier and it was $50 more than the ARF. I ordered it anyway and waited 2 months before I cancelled the order. I've has a soft spot in my heart for a Yak 50. I would have to draw it myself because I want a 50CC Size one. Again my local hobby shop doesn't stock wood. So I draw the airplane and order the wood of the internet. If I miss or forget something I'm back to ordering and waiting. If I didn't think it would take a year to draw and build I'd do it anyway. Maybe I will.