I think the best character breakfast without kids is the one at the Cape May Cafe at the Beach Club. I've gone once with kids and twice without kids, and have never been disappointed by this one. The food is great, and the characters are a lot of fun. It doesn't seem as crazy busy as some of the other character meals I go to, and is not completely swarming with kids. If you go, make sure you try the roast beef hash--it's awesome.
Karen