Suppose everything to do with anime keeps me editing.
I like to meet and talk to new editors all the time.
I enjoy watching anime, AMV's, etc.
Fun hobby to relieve stress.
Creativity & imagination needed to create some really interesting ideas.
Competition in Cons/Contest is mega fun for me.
Editing Graphics with anime in them.
Big ideas other editors pull off that I really love.
Regardless of how many projects I start or drop. Everything sparks something new in my mind that I must attempt to edit whether I can pull it off or not. Its just fun to try, and see what you can create (as well as others).

