I don't like being evil just for the sake of being evil (not saying that that's what the OP is getting at, though). What appealed to me in Tropico 1 was that I started out trying to be a good guy, but the economic difficulties (and my own inexperience at the time) forced me to often take draconian "evil" measures to keep the island afloat. And sometimes the nagging of some people make you want to lash out at them.

This continues in Tropico 3 where I often use martial law just to prevent people from voting me out of office (thus ending the game) when I have trouble keeping them happy. I must take these harsh decisions even when I'm really trying to be as close to a benign/democratic leader as I can be. I like that the game temps me by offering me rewards for immoral behavior and offers the easiest/fastest/cheapest solutions to a problem in repression. I'm fine with any despot additions to T4 so long as they have a practical/useful basis in the game rather than turning El Presidente into Docter Evil.