That's what makes flying what you build so much fun. With the exception of sky diving or repelling, I don't think you can get a bigger adrenaline rush than the first flight on an aircraft that you just invested 50-500 hours on (some of the scale guys push 2000). That first high speed run up the field... Nose up! Is she going to go left, right, what about elevation, don't stall 'er, where are those darn trims, ok she's level, now hands off, how does she stall, ok now land her. Wooow, ok now walk around, shake your arms, stop your knees from clanking, and fill 'er and go again.

You'll never get that feeling from an ARF!