Snagged from embroiderama because it looks like an awesome meme (and also because I'm a sheep *g*):

The Days:
1. Something old
2. Something new - talk about a new fanwork of yours!
3. Something you made for someone else
4. Something you made just for yourself
5. Something for a large fandom/pairing/character
6. Something for a small fandom/pairing/character
7. Something you're just really proud of

Day 5 - Something for a large pairing
Hmm!!! I've never been part of a truly large fandom (I'm thinking Harry Potter, DCU, etc) so "large fandom" doesn't really apply here. I guess "large pairing" (or character, for that matter) would probably apply in the context of the "(not-so-)large fandom" so I'll go with that. :)
The main pairing in the NCIS fandom (if you ignore the Tiva nonsense) is probably Gibbs/Tony - as well it should be! *g* One of my favorite stories - and one of the most popular stories, judging by the amount of feedback I've received - is Return to Me, a fusion with the David Duchovny & Minnie Driver movie, written for the ncis_bigbang a few years ago.
As for my other active fandom - White Collar - I think the largest pairing is probably actually a threesome, namely Peter/El/Neal. If it's not that, then it would be Peter/Neal. That alone makes this one of the coolest fandoms ever. \o/ A fic that features both is Trial Run, a wonderfully kinky PWP with Dom!Neal topping both El and Peter. *happy sigh*