I've been thinking about this one and I'd have to say my theme is decent watches.
There's a hint of diver, secret agent, playboy and bon vivant in my collection, with a large side-order of adventurer.
The Panerais I have are all iconic (111, 183, 187, 127) and I have a Rolex 1665, 1680 and a brace of 16610s. A Planet Ocean is the sole Omega, but I have a Navitimer, Chrono Avenger and SFSO in the Breitling camp and a handful of IWCs, from the stylish-but-dead Portuguese Chrono, to the classy pilot's 3717 passing through the Aquatimer 2000 and titanium GST Chrono. On top of that are a few odd-balls like a 60s Poljot dress watch giving hints of cold war opulence and a 70s Tissot Seastar alluding to an adventurous youth.
So, apart from blatant dress watches, I have everything a modern adventurer/bon vivant would need.