This is a frequently asked question and everybody has different opinion about this topic. In this post, I'll share a piece of the cake and answer your question based on my own opinions and preferences.
In that case, It's a No. I don't think age really matter in choosing a lifetime partner. First, one cannot control themselves on who they've fallen in love for. Second, One can be attracted to the person itself (his characteristics, personality, morale, traits,and etc) and not because of his age. And third, It is the love that bonds the two person in a relationship no matter what the age gap is.
With that being said, my personal preference for a partner is being "mature" in every aspects of life. And being mature doesn't mean he has to be older than me because maturity is synonymous to life experience and common sense. There are a lot of men that mature at a very young age because they have to. It's a necessity, It is whats needed for his current environment. Likewise, there are also men who is older in age but acts immaturely and childish. So really, I don't think age matter in a relationship, as long as you love each other and understand each other. That's all that matters. :)