Birthdays are a MUST as a kid. But for me, as I've gotten older, I've been celebrating less. My family usually goes out for dinner, no cake, no presents....just hugs! However, this year I turned 30 and DF took me to a very fancy restaurant and afterwards we bar hoped with friends. Maybe I will start celebrating big each decade!
I used to be all about the birthdays... even after I passed all the really good ones (16, 18, 21). I think it had to do with being an only child. My birthday was like my own personal holiday. Now that I have kids, I'm more interested in their birthdays than in my own, although I do still appreciate having a day when I pretty much get to do what I want without complaint from anyone else. It's the only way I can get my DH to cooperate for family portraits!