I was thinking about this since I always winge about hating colouring
But I also love almost all parts of comic making!
For me, I love sketching, lineart and shading so much that I think I'd only be willing to pass off base colouring work to an assistant. Hell, I pay one of my friends to colour my pages when they're able to, but I'd love to hire a full time colourist one day. Right now I only pay for colouring if I know I'm super busy.
But like, with every other process of making comics- I love it so much that I don't want someone else to do it. The sketching phase is pretty much giving myself a good idea of what the scene will look like and bringing it to life, lineart is relaxing for me and I love drawing the details and seeing the art refined, and shading is so nice as it really sets the mood. 
I dunno, having someone else do it just isn't the same. This means I'd probably get pages done slower, but tbh I don't care. I feel like I have a very specific style of lineart and shading that just isn't the same when someone else does it, and I like having control over how that looks.
Base colouring is not a very creative part of the process for me, it's just filling in the colours I have pre-set for my characters. Doesn't bring me much joy when doing it, it's only when I know I can move onto shading that I get excited.
Very specific discussion here haha
I'm curious to see other people's responses for their own comic.