I have only been painting a few years, but I've really come to enjoy the peace and calmness that goes with it.
My favorite kind of painting is Plein Air (painting outside). You must work quickly to capture the light and shadows before they change, and, you get to enjoy the great out-of-doors while you are working! If I'm not outside, I usually paint from photographs I have taken.
My medium of choice is acrylic paints, but I have done some work in watercolor as well.