As a researcher in CS, I give often presentations, where I always ask about the feedback from my colleagues. I personally don't like to put equations in my slides because I believe that nobody will have enough time to read the understand the equation (especially because in CS the equation is a tool to solve the problem and not the heart of the topic). Instead, I enrich the slides with intuitive figures and demonstrations. I've heard some professors encouraging the same approach, but in my current group, my professor and my colleagues believe that equations illustrate the complexity of the method and we should put them.
I don't think this is a question of preference, therefore, I would like to have more opinions about putting or not putting equations in presentation slides and why.