Music, I guess. I was never very musical despite coming from a musical family, and in retirement I am trying to make up for lost time. Scattered about the house are a number of instruments -- a nice Gretsch, a low-end Fender P-Bass, a decent Alesis drum box and some non-electric instruments that I need to repair: a late 19th-century parlor organ that needs some new reeds and a bellows repair, a small harpsichord that I built from a kit in 1975 and which needs some new strings and jacks, and so forth. Friday UPS is supposed to bring me a Yamaha keyboard I just ordered. I have a few songs knocking around in my head, and I'd like to get to the point of actually performing what I can hear in my mind.
Photography was a hobby for a while but submerged over the last few years. I kind of have the feeling it may crawl out again once I work up the nerve to divert some gun money to a good high-end DSLR. I experiment with infrared photography from time to time, and since most digital cameras see a little into the infrared, a visually opaque filter that lets long wavelengths through will produce some interesting images. I like B&W infrared photos a lot more than I like false-color photos, so I am big on the white foliage/black sky school of nature photography. There are conversion companies that will fix a stock digital camera to make it function far more effectively in the IR spectrum. I'm not sure if I'm enough of an IR nut to go that far, but the possibility exists and I find myself reflecting on it from time to time. So who knows?
It's fascinating to see where the rest of the forum members spend their time and hobby money. What an interesting bunch of people hang out here!