My father has always been a watch fan, so I was almost brought up on the idea of having a good watch. As others have said, many will never really devalue either.
I invested in a Raymond Weil Tango that I wear for work (black strap, dial and bezel) and it has lasted me for around five years now - bit scratched but doing well.
For my wedding present, my wife got me a Rolex Daytona and I still love wearing it to this day on special occasions because of it's real sentimental value.
The latter should last me a lift time as it's rarely worn and I have got it serviced, so I'll probably wear it more regularly when I'm old and retired.