I've never been to one, but I'd love to go someday! I love cats, and I'd love to see if there were any rare breeds I could finally look at up close (like the Havana Brown).
Though I agree with you about the Persians, and Exotics (short-haired Persians) and Himalayans, for that matter. I hear they have such sweet temperaments, but I just don't like that smashed-in look their faces have. Which may be a little odd, because I even think Sphinxes and "Rex" breeds look cute in their own way.