I've been having a hard time answering this one
There is the obvious answer......my collection
There are the "Size matters" collections - RobertK and Tanfangilo come to mind.
There are the "Quality over Quantity" collections - TTK, Ubi, Richard and Euno come to mind.
There are the "Franken" Collections - Ubi, Ollie, Freddie and Saabin come to mind.
There are the Panerai "Straps Make the watch" collections - V and Rolli come to mind.
There are the "Pictures to die for" collections - TTK, By-Tor, Bazz and Puggy come to mind.
but my personal favorite is
The "Who cares about the watch - Look at the girl wearing it" collections and SQL and Rocket certainly come to mind
The truth is, I like watches. All kinds of watches. Everyones collection generally has something I admire
As By-Tor said and Ubi agreed - Too many to list them all