Within the past year (little longer now that I think of it) I've been into using software defined radios or SDR dongles as more commonly named for police scanning, ADS-B aircraft tracking, and now getting into weather radar/baloon/satellite information gathering using the same units and different antennae. I have a small dedicated ADS-B antenna that filters out all the other frequencies, a set of 'rabbit ear' antennae for scanning while away from my home, and even a couple T style dipoles for vehicles.
It can be a cheap hobby, you can get a compatible dongle for like 8-20 bucks... far cheaper than a dedicated scanner with WAY more capabilities. FM/AM tuning, ALL police bands (except encrypted but INCLUDING trunking if not encrypted), weather, military, satellite, airport/aircraft frequencies with a very wide tuning range. Later today I'll show pics of the stuff I currently use, which by this weekend will have a new antenna rig for even more abilities