I too have a pap cave (minus a pap) which I try to dominate however it keeps getting invaded by laundry, other halfs work stuff, toddler toys, random friends on sleepovers etc etc.
It has various old PCs, consoles, LCD TV and PS3 etc, electric guitar and amp, (+rockband ps3 gear), general geeky stuff stored away (some in the loft) An Atari Jaguar collection, not yet complete, games workshop stuff too.
Also have a surfboard, bodyboard, loads of scuba gear, petrol lawnmower, circular saw, used to have chainsaw, Marin mountain bike (hardly used), got a big black Maglite but left the batteries in too long and its all corroded inside (anyone know how to fix this?), a Leatherman multitool (superior to Swiss army knife imo)...
Would love to have a garage or massive shed to hide in and fill with more cr*p. Don't have a beer fridge, motorbike, boat or car.