When I write fanfiction, I publish it at:
Currently it's just Homestuck works.
If you're looking at my profile, chances are you want story recommendations. I enjoy stories that are not rehashes of canon, and do new and interesting things with the magic system of the source material. Without further ado,
Naruto recommendations:
If you want humor (in order of laughs-per-minute):
Nothing But Trouble: https://www.fanfiction.net/s/5001646/1/Nothing-but-Trouble
Innortal's Time Loops: https://www.fanfiction.net/s/3022400/7/The-Naruto-Omake-Files-Innortal-Style
Subject 014: https://www.fanfiction.net/s/7712904/2/Compilation [Don't let the "Teen Titans Crossover" lable confuse you - the author published all their stories in one place. There is 0 Tean Titans in this story.]
It's For a Good Cause, I Swear: https://www.fanfiction.net/s/5409165/1/It-s-For-a-Good-Cause-I-Swear
Ignorance Is Bliss: https://www.fanfiction.net/s/5765777/1/Ignorance-is-Bliss [if you liked Nothing But Trouble]
These are all "farces," that is, stories that prioritize humor over realism. In fanfiction, it's also known as "crack" I suppose.
If you want cool tricks with the magic system & cool plot:
Time Braid: https://www.fanfiction.net/s/5193644/1/Time-Braid [My #1 recommendation for plot & for "cool factor". Warnings for mysogeny on the author's part, very nasty torture, and a heroine who goes through a moral decay without quite realizing it. It won't be everyone's cup of tea.]
Medicinal Lullaby: https://www.fanfiction.net/s/4512691/1/Medicinal-Lullaby
A Drop Of Poison: https://www.fanfiction.net/s/4573620/1/A-Drop-of-Poison [Cool tricks, plot is meh, unfinished]
If you want a really pleasant 60K word story:
The Eyes Have It: https://www.fanfiction.net/s/8661803/1/The-Eyes-Have-It
Harry Potter recommendations:
Both funny and decent plot:
Harry Potter and the Methods of Rationality: https://www.fanfiction.net/s/5782108/1/Harry-Potter-and-the-Methods-of-Rationality [Warnings for being an athiest's Chronicles of Narnia, but very high quality humor, plot, writing, and philosophy]
Harry Potter and the Natural 20: https://www.fanfiction.net/s/8096183/1/Harry-Potter-and-the-Natural-20 [Way better than it sounds. Only recommended if you've played D&D.]
Both funny and awesome writing:
Potter Who and the Wossname's Thingummy: https://www.fanfiction.net/s/8484470/1/Potter-Who-and-the-Wossname-s-Thingummy [Read the first 1/2 of a chapter. If you're not laughing by then, then it's not for you]