I like trying out a bunch of different systems, and there's a lot to like, especially with a lot of the smaller games out there. I do like there 'narrative' approach ttrpgs feel like they've been taking recently, but between Chronicles of Darkness, ICON, Forged in the Dark, Apocalypse world, etc., and all there spinoff systems all having XP be earned for specific actions in game, its just a pain in the ass, that takes me out of the action.

I mostly GM, but I strongly prefer milestone XP. For some of the above games, its easy enough to gut their bespoke XP systems out of it, and just have players advance over time, but in several of them, it fucks with the overall balance, since several actions are 'bad', but made worthwhile because they earn XP.

But I don't like the feeling of interrupting game to award point, and adjudicate character advancement. And I hate systems that have players advance unevenly. There's always going to be a certain degree on uneven-ness in player attention, of rules mastery, and of spotlighting. As GM, its important to manage those so that everyone gets a chance to shine. But it just feels like increasing that workload for the GM, to need to additionally pay attention to the XP, and try to drag or XP share the players that don't find those systems engaging to not mechanically fall behind.

And as a player, I tend to have higher system mastery and attention than the others I play with, and tbh it feels bad to end up with more XP because of that. But also, it feels bad to knowingly pass up free XP by purposefully not engaging with those systems.