RE: How old are you?
46 here. I've been in the hobby for three years. Like many here, I got started flying control line as a kid and then got away from planes for several years. Scale planes and warbirds was what got me back into the hobby. I also fly helicopters with an interest in scale and military birds.
One of the great things about the hobby is that it's so diverse and offers something for most anyone. I can't think of any other hobby that is so multifaceted.
Cheers! BH