The only thing I hate is lineart; long tedious process and honestly pretty painful to work on after a length of time
About the only other thing I dislike is self advertising as you've got to really think about how to brand yourself or your work among other little logistic things involved with promotion. Making extra artwork isn't much of a hassle and sometimes feels a lot easier than making the comics themselves but no one else is gonna make content about your own characters especially the specific ways you've envisioned them.
The things I really love are probably developing characters and fleshing out story lines, working out certain plot points and organizing how things fall into place, though I wish I could be better organized about it.
My absolute favorite thing would probably be coloring. True color theory can be a bit of a pain in the ash but it's the only thing I ever feel really confident about and if I'm being honest experimenting with color temperatures, schemes, and even certain coloring styles/techniques is the one thing that motivates me and keeps me interested.
The closest second to that would be sketching out panels or illustrations. Easily the most fun and leaves room for experimentation on finding what works best for a certain bit of dialogue or scene or whichever.
Everything else falls solidly on a seesaw bouncing back and forth between okay and awful and rarely any in between