Those are probably two different questions. Who am I most like?
Probably Shuichi from Hourou Musuko, although much further along in my life development.
Who do I most want to be? That's pretty difficult. Being pretty happy with my current personality and identity, I'm not sure there's any character I want to be
. Who do I want to be the most like
in some senses might be a better question. Not enough anime focuses on late twenty-somethings, early thirty-somethings... so I don't know. Most anime characters are teenagers, so not really role models, per se.