Having worked with digital cartography/GIS for about 8 years, I always wanted a GPS. But I never saw any real use for it. I usually know where I am, on a daily basis.
But a friend of mine had borrowed his dads GPSr and talked about geocaching with his family. I had heard about geocaching before, but sort of dismissed it as uncool at the time. My friend didn't need to use much persuasion however, and after a week I had bought a Garmin GPSr. Have located a few caches after that, but then reality struck in and I haven't had much time to do much caching. Hopefully I will get more time to spend on this soon.