Bicycles... Not just any old bike. Hand made steel frames:
Audax Reynolds 631 with Campy Veloce groupset
Fixie Reynolds 631 with Dura Ace cranks and DT Swiss rims laced to Phil Wood Hubs
LoPro Columbus Thron tubed Fixie with Campy Record groupset
Road Columbus XCR Stainless Steel with Campy Record groupset
Pretty much the same sort of obsession as with my watch collection!