Re: Why a ketch?
Ketches are gorgeous, IMHO. They look more "salty". I also like bowsprits, for which I am often mocked (although my boat has neither!). Aesthetics are very personal....
I really like cutter rigs. The inner staysail works very well with a very reefed main in heavy weather, very balanced. I also think they look mighty fine with both headsails up.