My favorite is records, mostly from the 50's & 60's. I have more LP's (you know, the big black circles with the little holes) and 45's (you know, the little black circles with the big holes) than the board has losing betting slips. They fill up 1/2 of my office easily. My specialty and favorites are original Surf & Hot Rod pieces.
Also have a few hundred different beer cans from the 60's & 70's.
Old Guitars & Amps, but they take up too much space, so I just unloaded a few pieces, including a Fender Strat...... '63 Lake Placid Blue. Hated to let it go, it was so pretty, but I got good cash for it along with two pre-65 blackface Fender Amps.
1:18 & 1:24 model replica cars, mostly Corvettes.
Got a hundred or so sealed boxes of sports cards, but don't really consider myself a collector. I've recently been donating a box or two per request to the local Boy Scout Troop for their auctions.
Have 20 or so autographed baseballs. I've got Billy Martin, wondering if it would be wise to get George Steinbrenner on the other side of it.
Some older Playboys, complete from about 1960 to 1980 or so.
And, like 1837, I have some coins put away in the bank vault.
It's pretty hard to get me bored......all of the above fill up a lotta spare hours