I guess most of the people say my parents.
I do the same with some addition: my grandparents influenced me a lot too, perticularly my grandma, who was a very peaceful and helpful woman, she was very religious and was loving with everyone. Sadly, she passed away 2 years ago, but there's no day on which I would not think of her!
Despite these in the past 7 years I think my fiance (oops, my husband - for a week now :)) had the most influence on me. Without influencing each other in good and bad ways as well, there would be no long term relationships I guess.