Jumping on this meme after seeing so many people do it. Out of the 80 works on AO3:

Rules: How many letters of the alphabet have you used for [starting] a fic title? One fic per line, ‘A’ and 'The’ do not count for 'a’ and ’t’. Post your score out of 26 at the end, along with your total fic count.

A — aftermath (rise of the teenage mutant ninja turtles)
B — birthday prayers (squid game)
C — creatures of the sea (percy jackson x danny phantom)
D — the distant reach of her voice (inuyasha)
E — enemies and love (boruto)
F — footsteps to sunrise (ancient greek religion & lore)
G — ghosts at twilight (re:zero)
H — honorary titan? less likely than you think (teen titans x danny phantom)
I — ill-gotten (红魔女与苏女侠 | red devil and heroine su)
J — jewelled touch (handsome girl and sheltered girl)
K — 
L — look (batman beyond)
M — making friends (shelter: the animation)
N — naming conventions (shang-chi and the legend of the ten rings)
O — ollie the plushie (invincible)
P — promises (venom)
Q —
R — recollection (voltron: legendary defender)
S — siblinghood (vivy: fluorite eye's song)
T — tea garden dreams (fugou keiji: balance unlimited)
U — unaligned (danny phantom)
V —
W — what are words? (original work)
X — 
Y — your displacement (alice tv 2020)
Z —

Got 21/26! I tried to find fics that came from a different fandom each... May have cheated with Danny Phantom appearing three times, but I'm counting crossovers as their individual fandom for the sake of this meme. Interestingly I have a good number of fics starting with i (specifically starting with "in") as well as g, f, l, m, o and p.

I've got a few three-sentence fics living in threesentenceficathon that I haven't archived on AO3 yet, as well as untitled drabbles drifting about in my gdrive. Wonder if I'd ever give them names starting with v, x or z.

I'm surprised that I could find so many fics for different fandoms though. I've consumed so much media over the years :0

The html copied from octahedrite:

<b>Rules: How many letters of the alphabet have you used for [starting] a fic title? One fic per line, ‘A’ and 'The’ do not count for 'a’ and ’t’. Post your score out of 26 at the end, along with your total fic count.</b></p> <pre><code>A — B — C — D — E — F — G — H — I — J — K — L — M — N — O — P — Q — R — S — T — U — V — W — X — Y — Z — </code></pre> <p>