Love: Expressions! Whenever I'm bored I just start drawing my characters making funny faces, and I'll take way too much time trying to craft the perfect face for the moment in the story.
Hate: I have to join the chorus of "backgrounds"; I hate them with a blood-curdling passion and will use every trick in the book to cheat on them. 3D models, photobashing, reusing them, whatever keeps me from having to deal with perspective rulers and all that all the time.
The next chapter of my series takes place in a city and I want to cry just thinking about how long the backgrounds are going to take.