Which RC machine should I get?

I've had cars, boats, planes, and a few helis. My personal favorite is a plane. They are much easier to learn than helis, but take a while longer than boats and cars, which take almost no time at all to learn. You can do way more stuff (loops etc.) with planes and helis than boats and cars. Helis are harder to land than planes because of the difficulty of descending and hovering at the same time. I'm not saying that boats, cars, and helis aren't fun, they just get a little old after a while. I recommend starting with a Aerobird III or something like that for your first plane. Its pretty cheap as far as planes go ($150).