The way I see it is that, historically, the left have been driven mainly by political agendas. They want power in order to do things to people. And, when faced by ideas beyond their comfort zone, they try to enlist them and to pervert them into supporting their own agendas. The right, on the other hand, are more driven by selfishness and greed. They want power because they enjoy it, and in order to make themselves rich. And their response to ideas outside their comfort zone is usually to ignore them, or to try to suppress them.
Moreover, there are hatreds common to many on both left and right. Notably, both hate people who are different. And most of all, those who are different from themselves. Almost no-one in politics, either left or right, has any empathy or real concern for the individual human beings they seek to rule over. The worst of them, on both sides, even go so far as to hate humanity as a species. But while the left hate most those who develop their talents and make themselves good at anything, the right hate more those who have the wrong skin colour, culture or religion. And both of them hate anyone who tries to be individual and independent, or dares to disagree with them in any way.
All political ideologies today, from my point of view, are no more than a mixture of these two tendencies in one proportion or another.