I like M because it is one of the most recognized sounds in all languages and stays the same sound with little or no change from one language to another. R is bad because every language seems to have its own version of it.

i like f most , as it is the first letter of my family name !

i like J as it's the first letter of my name.

Maybe "a" because it is the first one.

Hello, Never thought of a favorite letter in English alphabet :) weird? I don't know , it should be for example my name's initial,but it ain't . I just don't have a favorite one !