Nah, I made the same mistake thinking Nico loved fighting in and of itself, but someone here pointed out that's wrong. Nico cares about the status and pride that ultimate power brings. Michael on the other hand does not seem to give much shit about such things.
As in, to Nico, being more powerful than everyone else is a means to an end, which is status, rank, and so on, whilst for Michael, power is the end goal with nothing else besides that.
I mean Nico is going on and on about her position and titles in HERO multiple times, aspiring to be captain even, but can you imagine Michael giving a shit about any of that ? I can't see Michael caring about recognition from others as a main goal.