I have been playing Ridiculous, and frankly, it is a bit harder than it should be for me to enjoy it. I mean, I have won the last game, but it was a struggle 'till the end, and not in a nice way. When your level 12 units with 80 dodge are barely the equal to enemy's level 4 crappily designed infantry, it's hard to enjoy yourself.
On the other hand, the level beneath ridiculous is trivial when I play the way I play on ridiculous (custom race, wealthy sovereign) and not that challenging when I playeded with Gilden and Resoln. I did not finish those three games, but when you meet AIs at 1/3 your power, it's not fun.
So, right now, I am trying to fine tune a setting so that I enjoy it. I just think that the five (very good) free traits on ridiculous kill enjoyment. When a basic militia need battlefield tactics for a level 6 sovereign, a level 4 hero and a leatherclad, shieldbearing Krax sprearman to handle, there's something wrong.