I have a condition called synesthesia.
Or at least, that's what all the online tests I've taken confirm. And I think I match the description. Long story short, when I see letters and numbers, I see colors. Every number and every letter has a specific color and sometimes personality. And put together whole words have their own colors and characters. This is apparently really rare, so I decided I'd try and explain what it feels like.
All vowels are mostly clear, except for U, which is tan-beige. Likewise, E and O have a slight silver twinge and A and I have a bit of white. Y I don't count as a vowel and it's yellow.
Yellow is the most common color for my letters. C K V X and Y are all yellow. I really dislike the color yellow and as a corollary, dislike all these letters (except for V, which is noble). I don't know why certain letters are colored the way they are. Some people posit that early on in childhood, very strong associations are made between letters and certain colors. It may explain why I see R as red (I hate the color red and likewise see R as the asshole letter, even though it's one of my favorites), B and brown, Y as yellow, and L as blue. But it doesn't explain why D is purple, M is orange, S and Z are green (but different shades), F is brown, or J is blue.
I don't know which influenced which, but my favorite letters (with the exception of R and V) correspond to my favorite colors. As such, I'm fond of words with lots of brown, green, blue, and purple in them. "Flush," or "Forest," evoke a nice display, as does "Delirium." Fittingly, "Rose" is red and green (R = red, S = green, vowels are clear). Even if I'm not fond of the particular colors of a word, if their combination is one that's good, then I still like the word. Hence, "Reverie" is like burgundy and yellow embroidered cushions but I still like this word because it works well. Conversely, I find the word "Computer" to be ugly because of its hodgepodge of yellow, black (T), orange,...