For me, the best thing about ham radio are the connections you make with people - in that ham radio enthusiasts are self selected. They seem to be an eclectic bunch of resourceful, witty, kind, and clever people.
You can listen to amateur radio without a license, you just can't transmit. Pick up a Baofeng 2 meter unit from Amazon and find your local repeater. Or, find a local Ham club and I'm sure they'll talk to you for hours about it! :-)