In reply to Steve Woollard:
It might be sad but i don't see anything unhealthy about it - quite the opposite in fact.
I know lots of people who have no interests at all and wonder what they will have to look back on when they are in their final years : at least I've got memories of great days out on the rock, some pretty close calls, some abject failures, some hilarious escapades, some beautiful places and some treasured partnerships to look back on.