Agreed, really enjoy solving tough problems. Like having some interesting enhancement that needs to be carefully and surgical added into a complex codebase. Or writing an algorithm that grabs a bunch of info, sorts it in multiple ways, and uses this info to generate a useful result for our API (am thinking of specific past situations that have done this).

What is not fun is the repetitive stuff, where you have to search a code base for the same change over and over again, but it's not something you can just do a search and replace. Am happy to have AI do this (although, even this, you still have to read through every change).