Interesting question........
I must admit that I go through times where for a month or so I just take a break from flying. Still, I believe it's the best hobby in the world. It's going to take you a season or two to just get the basics down of putting an ARF together, then tuning the engine, and of course, keeping your plane in the air. After that, at least for me, the planes get bigger, you might get a 4-stroke engine to broaden your skills, along with retracts, glow drivers, flaps, and on down the line. Doing stunts is a whole subject by itself. Sometimes after you crash you want to hang it up, too, but take it from a crash-expert, just get another plane - one that you can handle - and get back in there. I used to drive monster trucks, too, but I got tired of fixing them all the time, plus there's something about FLIGHT that makes it all worth while. I've been flying for about 6 years and I know for a fact that there's ALOT more to know in this hobby.