This is lovely and clean and simple. I'm not sure how well it will work as a poster, though it would be good on a cup or a T shirt or on letterhead. I tend ot like funny things and would be interested in something with a sense of humour.
I still really like this one but I think we need Adding Life to Years in there somewhere (Life underlined) and perhaps in the blues and purples with maybe some yellow? I like the use of Y for the person very much. Please try again!