In advance, before I go and attempt something like a manual import, personally. (Because I don't trust no importer to fuck things up
)
I have a few ideas for General Suffixes that might be of interest.
For User Fiction (IE: Fanfics and Originals.) How about Suffixes such as;
AU (For Alternative Universe)
SI (Self Insert, self explanitory)
XOver (short for Crossover)
Original (for any story/Original Work that's NOT based on any Fandom, or established Fiction.)
Round Robin (For collaborative stories. That in advance, are Different from your Quests and RP's.)
And on the RP, Questing and RP's, espeically with Quest. Consider a suffix for...
Story Only, or Story/Index
Another thing, but you may want to in future also consider a special 'Gauntlet' Suffix for Versus, and a few other terms that may or may not be included as they become relevant.
EDIT: You may also want to consider adding Suffixes such as 'ROB' and 'What If?' In General, due to all the constant B/ROB, ASB's est sort of threads.