I love this so much. Thank you for writing this. "RPF/Band Fics" make me cringe...
Well as for things you MISSED:
SIBLING/COUSINS FICS: Fics where Legolas/Aragorn/Bilbo etc suddenly has a sibling/cousin, and he/(more commonly)She HAS to come along on the quest. (And subsequently the story slowly disintegrates into said sibling's personal diary from there.)
^This also complies to "WOMEN BEING AWESOME" fics. Where (Arwen usually) hikes up her skirts and comes along, and of course, she's a master at the sword/bow, healing, and is so smart and wonderful that all the male characters are in awe of her. And anyone who ISN'T absolutely besotted with her, or who shows a normal for the time period reaction to a female warrior (Ie: Disdain) is ogled at in bewilderment like they've grown a second head and none of the main male protagonists seem to have any knowledge that "that reaction" is the prevailing wisdom of the times. And of course, the "perfect" female protagonist only gets mildly bothered by these reactions, and instead holds her head up high and abstains from kicking her critics' ass like a real tomboy would. (PC in LotR/Hobbit fanfics are painful.)
Then also is my personal pet peeve that shows up increasingly:
"GENDER BENDER"
Bilbo Baggins and Thorin Oakenshield being together is "gross". But Bilba/Bella Baggins and Thorin Oakenshield together is PERFECTLY acceptable....
Usually used to work in pairings that would otherwise be slash. Or simply to have a "canon?" female character in the male dominated (for once) storyline.
I would rather have a dozen OC females or WBA!Arwen along rather then see Boromir in a skirt...
And of course the newly minted femsona! versions act absolutely NOTHING like their original male counterparts... Which again makes me scream and claw my eyes out and demand an OC be made instead.
I generally dislike female characters in fanfiction. As they all seem to eventually become the same woman where as the guys at least have individual personalities...
Anyways, great fic... Informational Pamplet. lol