As I understand it, Fascism is usually one of the first 3 Industrial techs that the AIs tend to research (after Nationalism and then Communism).
If they're at peace, they'll tend already to be and stay in Republic or Democracy, but if they were already involved in an extended war when they got to Communism (first), they would likely have switched already to reduce WW (which I
believe is a major trigger for AI-revolutions). Since they'd already be in a zero-WW gov, they might then not 'need' to go Fascist when they get that tech. However, if they get into a long war
after they get to Fascism, they revolt into it instead almost by default (losing 2 pop-points from every town) for the zero WW and higher free-unit mantenance (7 per City vs 6 under Commie).
(And long wars are almost inevitable in the late game, given that the AIs also 'love' making MPPs, which they've been able to do since getting Nationalism -- i.e. likely
at least 2 techs earlier). But because Fascism is not actually that great a gov-form (in-game
and in life?), revolting tends to hinder the AI rather than help it -- especially if you (or your allies) are now Arty-bombing it, and/or rolling Cavs/Tanks over it, and it starts desperately drafting its remaining citizens, then whipping the rest to death, to defend its borders from your boarders.
So it's not so much that the AI 'loves' Fascism, rather that it drunkard's-walks its way into that ditch, and then can't easily get out again before you've killed it.Did you
read this article (and the related discussion) already? And also
Theov's list of C3C gov-types?
To answer your question though -- I tend not to revolt more than once. I went through most of my last two games as a warmongering Republic -- a 'PTW-like' Monarch game as the Indians on a Standard Continents map (won Diplo-vic), and COTM 117 as the Americans, also at Monarch on a custom 'Archipelago' (won Dom-vic). I only signed peace once in the COTM, and I wish I hadn't, because not killing off the
REDACTED when I had the chance after their first DoW, later slowed me down significantly, because after our second (and final) war, I then had to take some of their ex-cities from the
REDACTED, fighting Medival Iron-units, instead of Ancient non-Iron-units.