I hate game balance; it limits asymmetry, which is useful to replayability. I understand that it appeals to those that play multiplayer, but balance does nothing to improve gameplay in single player, which is what I personally care about.
I’d even love it if - as in Crusader Kings 3 - part of the difficulty came down to which nation and leader you choose. Playing as Rome could give so many extra bonuses as to be easy mode, whereas you’d really have to be a Deity level player to win with a civ like Aksum.