Nah, I love colouring. Used to be a pro at it back when it didn't practically require a loan to buy copic markers.
While it can be repetitive, there are a few differences depending on what kind of comic you have. Story comics for example can have different moods, locations, and time frames, which prompts you to change your pallet to fit those new things. It's a great way to experiment with shading techniques, and colour choices that you wouldn't work with otherwise. You can even experiment with new mediums, such as mixing markers with colour paper, using combinations of different tools to get interesting results.
I feel that some comics also require colour in them to get the proper feel for the scene. Normally I prefer working with b&w and have a colourless comic off-site, but I decided to make 'Void'(Warning: Blood, violence, nudity) fullcolour because there will be some scenes in the comic that won't translate well without it. Sure, the process can be a pain, especially when you have a bunch of little things to colour. But the results are great!... sometimes. 