I'm convinced the people who love Ezio are the same type of people who support Trump (the ones who believe he'll be great because he has 'strength' and 'passion'). They're both brash, arrogant, ignorant assholes who appeal to really only the basest of demographics. Ezio finally starts learning from his mistakes and becoming a better person in Revelations, which is the same game these people seem to dislike. TO BE CLEAR: I'm not talking about the racism and disturbing policies, purely the way they both act and speak. Their personas. Hell, you've all heard of those people who like the way he 'says what he thinks' and whatnot.
Sorry folks, Altair is the probably the only actual person in the series. Feels like an actual human being compared to simply a character (or caricature in Ezio's case).