"If you are not depriving yourself of work, family, exercise or sleeping time, then it's fine to spend as much time on watches as you can enjoy"
A perfect hypothesis: nothing more need be said. After all, what's the alternative? Another television show? More overtime at work?
It is also worth reflecting on the different facets offered by this interest. Unlike some other 'collecting' hobbies, perhaps, there is depth and breadth available to those who want it, and at all levels of 'entry': from the schoolchild with a rudimentary collection of 'FlickFlack' watches, to the keen horology student without a single watch, to the world-weary European nobleman with a vast collection of museum quality timepieces.
What other interests, for example, may be served simultaneously? Reading? Read books on watchmaking, watchmakers, collections, brands. History? Learn about the history of timekeeping; its value, its problems and mankind's ingenious solutions to those problems. Business? Buy, sell, trade, arbitrage. Socialising? Enjoy clubs, events, GTG's, online friendships, 'live' friendships. Maths, or science? Watchmaking, watch design, astronomical computation, materials analysis, testing. Handiwork? Try your hand at tooling, enamelling, gemsetting, strapmaking. Art? Engraving, painting, cloisonné. Writing? The world can always use another watch journalist, author, even forum contributor - and so on, and on, and on.
Always in all things, however, subject to that caveat: if you are not depriving yourself of work, family, exercise or sleeping time - and not necessarily in that order!
Cheers,
pplater.