I hate it when fic authors marry of a character but neglect to say who they've married. Especially if the reason given is because a) it's not important to the story, even though said significant other is mentioned/present, b) they don't want to anger various 'ship subsets, or c) because they haven't thought about it and don't know themselves.
It seems to me to be lazy, slipshod, and not creative. Pick a canon character, or make someone up, but don't just leave a faceless gap. Please? The poor character deserves that much.