I'm in my 20's and am in that "what do I do" phase of my life, but I know that I do love to help people and that makes me happy. That's the simplest way of putting it.
I inherently feel the need to help people. I'm very attentive and work hard. I'm very flexible and happy. I pick up on things well and do what needs to be done. I take what needs to be taken seriously, seriously, but create a fun work environment as well.