I'm surprised not to see more answer to your question. I can't say I'm a real writer but the only pairs I have written anything about are Napoleon/Illya (well, rather Napoleon & Illya so far) and my beloved Bodie/Cowley from "The Professionals" (see icon). It's an unpopular, ill-fated pairing, so I don't get much feed-back (though the few I get are very encouraging).