B - A pairing you initially didn’t consider but someone changed your mind
Well, to be honest, a lot of my ships are caused by the fics I've read. The most prominent example has to be Johnlock. Yeah, you heard correctly; when I first got into the fandom, I didn't ship Sherlock/John. Of course, things have obviously changed since then...
I - Has tumblr caused you to stop liking any fandoms, if so, which and why
No, I tend to be pretty happy with the fandoms I'm in. Mind you, I've drifted away from Glee lately, but I don't think that has anything to do with Tumblr :)
S - Show us an example of your personal headcanon
Well, my sext blog is a pretty good example of (one of) my headcanons :) Hell, taking a look at any of my fics is a pretty good indication of my headcanons XD
Z - Just ramble about something fan-related, go go go
Since I was talking to Mary about this earlier: I love junkie!lock. And I was so sure that there would be some junkie!lock in Reichenbach Falls, what with the "danger nights" and "seven-percent-solution" leadups from the previous episodes... But yes, junkie!lock makes my heart soar in a very angsty and sadistic manner. It's great.
And "soar" reminds me of winglock, and that's an entirely different ramble altogether...