I'm 29 and for the most part I agree with you that I feel "too old for this" a lot when I am around people in their early 20's. However, I have met many people that are younger then they seem and older then they seem. One of my closest friends at work is 23 and I about dropped dead from shock when she told me her age. I never would have guessed she was so young. On the flip side, an ex-roomate of mine is 35 going on 12. I am looking forward to getting to know such a diverse group of people.