i did what Dreamersdare did and went and checked my MCR fics on AO3. Of the 18 only one is Frank/Gerard. Most of them are Waycest or Poison/Gerard. It is a shame when a fandom just becomes centralised around one pairing. This happened in SGA where McShep was and still is huge. The joy of LJ in its day was it was, as has been said, the only platform and the interaction was huge. I remember posting fics and getting 30+ comments and all the communities with challenges and fic finding was brilliant. DW just doesn't have that interaction anymore. People have gotten spread out to other platforms. I remember when I first got into bandom on LJ and it was huge. Mind you the the problem with really big fandoms is you sometimes get BNFs. I write in quite a few smaller fandoms and, for example in the Strictly Come Dancing fandom of 20 of the fics written for Craig/Bruno, 9 are written by Kat_lair and I but there is no interaction. I blame AO3 for the lack of comments these days because kudos is so easy to do from a generation obsessed with facebook. I won't go on a rant because nobody wants to hear that but it is a shame.