Love Cape May...
When we stayed at BC we ate at Cape May. I believe that character interaction is largely a time and place pixie dust kind of thing...however, I have to agree with a PP about CMC and it's more casual pace. If you have a morning to have a more relaxed morning, then definitely go for CMC. Not that it has to be slow...
When we went there, the seating was not done in a very orderly fashion, meaning that one section wasn't all seated and then moving on...it was more like a regular restaurant where the patrons were spread out over the servers. With that the characters came around more than once. It was great fun. I remember that DH was reading his newspaper and Minnie came back around and starting reading over his shoulder and pointing out something, whatever, it was the second time around to see her so there was actually more "interaction" and less posing and signing. Goofy did something too. It was such fun.
IMO, you should take advantage of the fact that you are are onsite and eat there. It's kind of a pain to get to for people relying on Disney transportation which explains why I could still get a ressie there during FD last week. (We just booked during the first week. We are driving ourselves and this was the character breakfast that I really wanted, and yay, it was available still.) Chock that up to transportation issues & location, not quality. I remember really enjoying my breakfast there.
We are going on a DTD day. We love DQ, and so our sleep in day is hitting this buffet for a later breakfast (9:40 AM) and then hitting the opening of DQ which is later in the morning...