I think the nice thing about being a watch obsessive is it's not obvious (unlike the Max Power boy racers!)
Most people don't notice unless you want to tell them.
I think the other nice thing about it is that unlike spending £5,000 on crap for a Clio that has zero resale value and probably makes the car worth less, at least with well chosen watches (particularly bought used) you can normally turn them back into most of the cash you've spent.