So Jenna Coleman has confirmed that she is leaving Doctor Who in an interview on Radio 1. I think I would quite enjoy seeing a male companion. I think there has been too much of a romantic vibe between the Doctor and the companion during the New Who era (although this was less evident in the most recent pairing) and I would like to see a different relationship. Though a crush on the Doctor from a male companion would be interesting.
However, I do hope that any girlfriend or female relation of a male companion would not be written as feebly as Mickey and Danny. Rory and Rose for ever!