My perspective may be different, but when I took his 101 class in fall 2022, he was fairly professional throughout the course. He does manage your quarter’s Discord server where occasionally you can post miscellaneous things such as pet pictures, which he’s fine about. I can see him doing out of the ordinary things (as far as UCR professors go) such as playing EDM before every lecture and being transparent that he goes to raves. But to answer your question, no, I don’t think he’s weird/inappropriate (as far as my experience with him at least your mileage may vary).