direstraits, I'm very sympathetic to this urge. When I'm not writing, I'm a professional dilettante.
Some of the stuff I do now:
--freeform crocheting bits of clothing, i.e., without a pattern. There are a lot of very good wool farms near me, so it's too tempting.
--I'm in the middle of an oil painting, a portrait of my dad and his brother, circa 1937, standing in a marsh on the East End of Long Island. (They're little kids, and I'm working from an old sepia photo, introducing my own idea of the colors.)
--I do the London Times cryptic crossword, sent to me by snail mail by a friend. Regular US crosswords have more in common with Trivial Pursuit than with a real puzzle, so I find them really boring.
--collecting clematis for my garden. I tried roses for while but they don't survive well in my climate.
--sitting on the local planning board. I've been asked and am considering it. I used to write a column on land use, so my name came up. Catching up on what's going on with various parcels in my town (mostly farms) so I know what I'm getting into before I meet with them.
--teaching Dog to talk. Long-term project.
Stuff I did in the past, in a dilettante fashion:
--Build websites for friends and local nonprofits.
--Line drawings of historic buildings.
--Buying fabric, putting it through the sewing machine, and regretting it.
--Collecting thrift shop clothes. Not a pretty habit over time, unless you own a storage facility. Giving clothes back to thrift shops.
--B&W chemistry for film photography. Had a darkroom in my previous house. Had a lot of fun. Unfortunately, this is such a specialized area of art since digital photography (which I detest, though it is convenient sometimes), that it is somewhat 'precious' now. I do love the result, though.
--Cooking: Indian phase, French phase, Japanese phase, Greek moment. I don't do as much these days. Sort of lost interest.