After a recent watch binge, I'm on a purge and during this purge (selling watches on eBay), I've contemplated the three watches I would keep in my collection if all the others had to go.
Here they are: Seiko Tuna SBBN017, Deep Blue Depthmaster Generation II black with blue dial, and Seiko Kinetic Prospex Tuna SUN019.
A watch obsessive realistically can't get his collection down to three. Eight is more realistic. But whatever your number is, lower is better. You bond with your prized watches better. You enjoy your smaller collection more. And you have more peace of mind.
Realistically, I couldn't part with my EcoZilla on Suppa bracelet, Orient Saturation Diver, Seiko Flightmaster SBDL021 on shark mesh, Benarus Moray Dart, Benarus Megalodon (coming in 2015) and Citizen Promaster BN2029.
So I could deal with 9. And if I kept my daily beaters, my Seiko Black Monster second generation and Ecozilla on rubber strap, I'd be at 11. That works for me.