I've found that it's the little things about parenting that tend to make it rewarding. Some of my absolute favorites include:
--being able to trim all fingers and toes of a sleeping boy while he stayed sleeping.
--an amazing toothless smile when you walk in a room.
--a big ol' belly laugh.
--having him fall asleep in your arms.
--watching him discover something new.
--seeing his little personality develop.
--being able to fix what bothers him (most of the time).
--loving someone more than I ever thought possible (this one is the coolest, btw).
Of course parenting comes with its whole box of challenges. But that's for another post.