I voted Communications hobbyist because that most closely matches the roots of my listening habit, but it's really the opposite. A long time ago I discovered a spot just beyond the end of 28R at PIT that's ideal for watching air traffic. To enhance the experience, I bought a cheapo Radio Shack radio that had AM, FM, and air band, but it had to be tuned manually. The next step was a scanner.
Along the way, I've flown as an observer with the Civil Air Patrol, done a lot of $100 hamburger flights with a friend that owns a Cessna Cardinal, and married a controller, (so now it's part of dinner table discussion every day here). Student pilot has always been one of those things that's just out of reach, and stiil is.
But truthfully, my initial interest in ATC was to actually *listen* to ATC...