Ah, obsession. Yes, that's a bugaboo. Nothing worse than when a fan obsesses over a show or actor, and feels that they should share (or, actually, overshare) that with you. At one con eons ago, a fan insisted on showing nothing but one series she LOVED in the con suite. Put me off attending that con again. And a fan friend, love her dearly, but if she mentions her favorite actor one more time.... or gets ticked off if someone else doesn't love him....