I find myself also repeatedly drawn and being involved with older men, I don't think there is anything wrong with it, my first serious relationship was with a man 11 years older than me, and many of my good male friends are a lot older than me. I think a part of it is a comfort level, for the most part I am very uncomfortable with men in my age range, or they really don't want to discuss or like to do the same things I do, not to say I haven't had interest in men my age range or I don't have male friends in my age range, I just find it easier to get along with men older than me and I seem to click with them better.
In terms of a romantic relationship as long as both parties are consenting adults, it doesn't really matter, as long as both people are happy and the relationship is healthy that is all that matters.
We all have our own preferences and tastes in life, nothing wrong with that