I help others.
I feel good when I help others.
I am good at helping others.
I want to help others.
adding the "want to" resonates differently - it emphasizes my desire to continue doing it, to start doing it, to become it, etc.
even with the limited "air time" my affirmations are getting (no way to play them back at night yet,) i still hear them throughout my day and they have positively impacted countless situations.
this is good stuff. :-)