What I enjoy most about writing is the ‘aha’ reaction I get when my mind finds a new twist or a new direction to go while writing. I am what is known as a plantser, somewhere between planning the book and flying by the seat of my pants. In this method of writing, there is a certain amount of writing with the flow, although it’s grounded in a general outline. This gives me plenty of room for ‘aha’ reactions.

I love it when I learn something new about a character, for example. I will do this while writing, where suddenly one of my characters does something surprising. I have to pause and see whether it’s out of character, and if it’s not, then I have learned something new about the character. One of my favorite recurring characters, Luke Dunstan, still surprises me at times.
Plots behave similarly. I might find a plot point flowing through my mind and onto the screen. I test it to see if it works, and if it does, it becomes part of the book. I don’t know how it happens, but it does. Maybe my subconscious does more writing than I give it credit for.
The ‘aha’ of new developments is my favorite part of writing.