What prejudices might you have?

I suppose that I might have some prejudices towards people based on social class, political beliefs, and religion.
I might think a little bit differently of someone right away if I found out they were, for example, Republican or very Catholic. However, that being said, my best friend fits into both categories.
I think probably slightly prejudge someone who is of a higher social class than me, but I would not feel any prejudice towards someone who is of my social class or lower.