First Fandom of 2015: Five Nights at Freddy's
Favorite Main Character of 2015: Frisk, Utena Tenjou, Freddy Fazbear, Kirby, Atreyu
Favorite Het Couple of 2015: Samekichi/Wadanohara, Frey/Arthur, Steven/Connie, Brendan/May
Favorite Yuri Couple of 2015: Undyne/Alphys, May/Lisia, Utena/Anthy, Juri/Shiori
Favorite Yaoi Couple of 2015: Papyrus/Mettaton, Jeff/Tony (nothing will stop me from shipping this. NOTHIIIIIIIIIIIING!), Maxie/Archie, Teddy/Loid
This doesn't fit in any of the above categories since one of the characters is nonbinary, so as a special mention: FRISK/ASRIEL IS LOVE. FRISK/ASRIEL IS LIFE.
Favorite Poly Ships of 2015: Chara/Asriel/Frisk, Chara/Asriel/Frisk, Chara/Asriel/Frisk. I think I'm obsessed.
Fandom That You Never Expected To Get Into: Steven Universe, Yandere Simulator
Fandom That Made An Unexpected Comeback: Kirby, briefly Yume Nikki
Fandom That Inspired The Most Crack: Undertale
Last Fandom of 2015: Undertale
Favorite Fandom of 2015: Undertale
Villain of the Year is Flowey, hands down.
Man, this was the worst year for Earthbound fandom, at least for me. ._.;;; Toxic people from tumblr make me hedgehog hiss. At least Mother 1 finally got released on Virtual Console. Thank god for Undertale fandom!
Not to mention I lost two people I cared about dearly this year: Uncle Ricke and Virginia, the cat who raised the kittens at the Cattery. They will never be forgotten, and Frisk is here to create wonderful new memories.