My hobbies seem to fluctuate a lot. It drives my wife nuts, so generally it's whatever I'm into at the time. Ones that have stuck around (for the time being at least):
Boardgames. Love them, have a decent sized collection that I've spent probably way too much time and money on including kitting them out with custom pieces, boxes, inserts (Kingdom Death especially) and recently started getting back into painting minis and acquired airbrushing supplies and decent paints.
DJing. Started back in college in Atlanta when I found an old direct drive turntable in an apartment. Used to play a lot when I had a dedicated setup, but with kids and wife's office now out of the house, the turntables are relegated to a bookshelf most of the time. I have Traktor which I use for digital sets with the TTs and a midi controller. Been interested in getting a Traktor controller instead to play around with, but when do I have the time these days (plus wife would probably kill me if I started bring more expensive electronics into the house).
Books. Stephen King in particular, but other favorite authors as well like Tad Williams, Patrick Rothfuss, etc. I like to collect hardback first editions. Have a whole set of Dark Tower Grant published 1st's, some signed by King and most of them signed by their respective artists. My prized one is The Waste Lands, where Ned Dameron did a remarque in the book (fancy word for sketch) of Jake and Oy, which was then captioned and signed by King at a meet and greet.
Wet Shaving. This one has definitely calmed down in the acquisition area over the past couple years as I've settled down with the few razors/soaps/after shaves that I really like and focused on using them till I need to order more. But when I started I just had to try every razor and ever brush and every soap/AS I could get my hands on. Have since sold off most of it. I also have matched set of 3 EverReady brushes that I restored by hand from old handles that I found at antique stores/ebay with knots from The Golden Nib and Shavemac. Currently I rotate between my Gillette New Style Long Comb double edge, and a F.W. Engles Leader straight razor.
Video Games. Currently own PS4, PS3, PSVita, Switch, WiiU, two 3DS's, SNES, and too many games to play with what little time I have. At least my PC is so old that I don't bother wasting any money on the Steam sales.