The guy I just started seeing is 11 years older than me... I have no issues about this and just last week he asked me if it bothers me. I thought it was sweet because he knows my mom is staying with me for a week and he is excited to meet her! I didn't even bring up the subject, he just wanted to know if my family would have issues with it.
My boyfriend is 16.5 years older than me (he turns 40 on November 7!) Anyway, I really don't think age difference is a problem in my relationship. He isn't your average 39-year old & we get along famously. Sometimes age really doesn't matter!
I think 6 years older than me is about my limit. I want to be with someone who I can experience life WITH - not someone who is so much older than me that he's already done it all before.