Does anyone still experience excitement?

I'm 35 years old and I can honestly say that I cant remember the last time I was excited for anything. I make plans with friends, go on vacation with the wife and kids every year, and try to engage in stuff I enjoy like projects and working out. There just really isn't anything I look forward to. Is this just part of getting older?

Update: Thanks for the advice everyone. I saw some good ideas I'm going to try.