For me, I think the most boring part is story-boarding. I'm the type of person who NEEDS to have at least a good amount of the story flesh out before I get into working on panels and whatnot. 
Sometimes, I can get this weird perfectionist attitude about it, and I'll rip out whole pages if I don't like where the story board is going. And sometimes, I'm like "screw it, I'll figure it out as I go"
The most fun I have is in the earlier stages and in the later stages: outlining and paneling. I am a freak for writing everything out and trying to see how many twists and turns I can add into my stories. And then just drawing all of that out in the final product makes it that much more amazing for me. 