Excellent, thanks for that. I never really have a problem with being told I'm right, especially on two counts :) So, yeah, if I end up choosing Librarians as one of my 6 fandoms (I'm trying to narrow down from, like, 10 right now!) I guess it's probably best to go with the AO3 version of the title - The Librarians (TV 2014) for clarity's sake. Actually, that's probably a good idea for all fandoms, now that I think on it.

Ooh, one other question (sorry!) - given how twisty and interconnected all the Marvel stuff has become (and I've lost track of a bunch of it by now), if my character who walks into the bar is part of the MCU, am I still allowed to have X-Men 1-3 in my list of fandoms, or is that considered too close a connection now?