It looks like I overlap with just about everyone here:
Website design
Photography
Graphics
Computers / operating systems / networking
Surveillance systems
Woodwork
Building / flying RC helis
Home theatre (4 in my house....how sad)
Music (player of flute, sax, clarinet, piano and bass guitar...none of them well enough to earn a living) plus a home studio. Always wanted to be an audio engineer
The list just goes on and on. The worst part is that I don't have enough time to do all of them, so I just flit from one to another. Astronomy is by far one of the mainstays!
Apart from the obvious, astronomy.
Building and repairing computers.
Motorcycles (rebuilding a Suzuki 750-4). After 30 years its great to be on a bike again
Reading (Scifi)
Collecting anything connected with Star Trek.
Woodwork, Metalwork (lets me use all the skills I've learned over 40 years of working, for ME
Woodworking/Cabinetmaking, Leadlight, although I haven't done any in ages, still have to replace the temporary leadlight I made for the front door when we moved into our house...12 years ago! My wife keeps reminding me on occasion, just incase I forget, bless her.. Also Computers & Electronics.
Talking about motor cycles, I've just committed to a bike for myself - after a 27 year layoff. I used to run a Yamaha FJ1100 and before that a Suzuki GSX1100. I hung up my helmet and haven't been on a bike - at all - since.
Today I committed to a BMW R1200GS.
Six weeks - can't wait. the current owner is on a 6 week trip around Australia before he goes back to Scotland, and on his departure I'll take ownership. Oh the freedom!
Other hobbies revolve around my Land Rover and touring/camping.
I play guitar and read, llike many others on here...
I also keep various reptiles and spiders, which takes up a fair bit of time, currently have 2 turtles, 1 blue-tongue lizard, 1 water dragon, 1 4ft long carpet snake as well as 2 bird-eating spiders (breeding pair), and a sydney funnel-web...