The following are the fanfiction stories I have liked on LJ and fanfiction.net.
personal favourites (can be found by looking up author pages on LJ unless stated otherwise):
top three
From the Desert to the Tower,
an_lagat_glasFallout,
bookishy (her fic page is
bookishy_fic)
Persistence of Memory,
lady_t_220 (her fiction is at
den_of_folly)
on to top seven - not in ranking order
Weekend at Vasey's,
aoxelfrieda The Lady of Nottingham,
ladykate63Illusions, theearth (
here on ffnet)
(all of the above are Guy/Marian)
Everything is a Choice,
jadey36 (also
here on ffnet; eventually Guy/Robin)
ETA The same author is writing a wonderfully tense and sexy sequel, Endgame, also on her journal.
There are plenty more to be found on
guyxmarian and on ffnet and I quite like some of them, esp some short ones, but these IMHO are the best.
A few other very good stories are WIP with uncertain takeup prospects (Exchange of Vows (
vividviolet), Fortune's Wheel (
an_lagat_glas), Most Unwanted (
hulamoth), Sober (
inabsentialuci)).
vaknathi has written beautiful Guy (/Marian) stories but the most promising of them, Eclipse of the Moon, is unfinished, and word is that he has left the fandom.
For good NC-17 laughs, get Dangerous to Know (
fedoralady). For raunchy but more serious adventures, the splendid Pleasure for Pleasure (
spikesbint) and the famous Countess (
ficmuse), and for shorter adult fun read the delicious In Your Eyes and I Never Said Sorry but I Honestly Meant to, and maybe the raunchiest of them all this side of hardcore slash, The Gaps Between (all by
lady_t_220).
On the fun side of things, other than the great Weekend at Vasey's, have really enjoyed the humorous short stories on
shinysparks' LJ page. Her Guy and Marian, for once, are able to be lighthearted together. Still, the Guy-Robin-Allan (NOT Guy/Robin/Allan!) s3 pranks (Teamwork, The Adventures of Sir Geoffrey and Lord Robert, and Alterations) are the best. (ETA she now also posts links to her new and equally fabulous sketches on the
lordgisborne comm).
Another humorous beauty is
grey_mills's
friend_hood log.- Unfortunately, it stalled after three updates, but they are well worth a read.
Can also recommend Desert Secrets (Kimmeth,
here on ffnet), Precious Things (
claudia_writes), Prisoners of Circumstance (
spikesbint), and A Battle of Wills (
susangrace).
sandrine,
littledivinity, and
katrushkalupin have great short stories.
Also, Cluelss Lust by
thymelady is charmingly sexy and funny. Save Me (
inabsentialuci) and Whispers (
thelilalbatross) are two more excellent shorter tales.
Wolf's Head by
corrielle, posted in
bigbanghood Dec 2009, is an interesting, well-plotted and well-written partial-role-reversal twist where *Guy* is the outlaw. The above-mentioned Everything is a Choice by
jadey36 is an exploration of the complex relationship between Guy and Robin (written from Robin's PoV but really draws you in).
...and if you happen to like consensual Guy/Robin, my sinful little secret, do check out Lion's Heart and King of the Oak by
grenegome Sexy, funny, and beautifully written.
Just my take, anyway. Probably missed a few more I liked. Definitely missed a lot of short ones. PM me if you have trouble finding any of these.