Letters ranked (by me) based by their aesthetic and sonic appeal.

Tier	Letters
S	V, X, Y, Z
A	A, C, D, H, J, K, O, Q, R, W
B	B, S, T
C	E, I
D	F, L, M, P, U
F	G, N

Here’s how Claude 4.5 Sonnet completes the same task.

Tier	Letters
S	K, V, X, Z
A	J, M, Q, S
B	B, D, N, P, R, T
C	A, C, E, F, G, H, L
D	I, O, U, W, Y
F	-

And ChatGPT 5.

Tier	Letters
S	R, S, T, V, Z
A	B, C, D, F, G, K, M, X
B	L, N, P, W
C	H, J, Q
D	Y
F	A, E, I, O, U

Conclusion: LLMs hate vowels.

Prompt

Create a tierlist of capital letters of the alphabet based on how cool they are - how they sound in a word, especially at the beginning of a word, how they look, and their general aesthetic and sonic value.

Tiers are S, A, B, C, D, and F. You may put as many letters as you like in each tier.