It was my birthday last week (March 1st). When my family asked me what I wanted, I said I didn't want anything. They thought this was a miserable situation and that I was unhappy about being 39 and didn't want to celebrate.
But my real reason is that I think I have too much 'stuff' and really, I need to get rid of it, not collect more. I'd rather just have time with my family to chill out and appreciate the experience.
I'm glad this post by Tim Harford, of the Financial Times, also backs this point of view, that 'experiences' make us happy, not possessions.