I am not sure I have an ultimate favorite but here are some of them:
I love cooking Italian (Lasagna, ravioli, stuffed manicotti, baked mosticolli), pizza, any thing chicken and anything Irish (yeah, the Irish take a lot of crap for our food, but some of it is irrisitable to me), pierogi, kielbasa and kraut with butter beans and lazy pierogi are some of the dishes I like (that I can think of right now anyway).