I'm completely by ear. Though I am very familiar with how printed music works.
When I was in school, I learned braill music, but what a complete pain. Especially for me, who has perfect pitch and a good ear. The problem with braille music is that it has to be memorized first anyway, unless I could learn to read with the tip of my nose or something as my hands were on the instrument. So, if it needs to be memorized anyway, in my case it was much easier to learn by ear.

Another of my teachers, wanting to make sure I understood how music worked, insisted upon dictating my music to me on a tape, rather than playing the part. It would go something like this:
"first measure, quarter G, second line, Tied 8ths' F first space E first line," etc etc. Talk about a long and tedious way to learn a tenor sax part for band class.

Now that I'm in Nashville, I have a good head understanding of numbers, so I can talk the same language as the other people I work with. My only problem is a minor song. I'm used to the root of the song being 1, period. So when a song is in G minor, all the Nashville guys think of that as 6 minor of B-flat. Whoever heard of a song being in the key of 6? So 2-5-1 into G minor is actually a 7-3-6. That's just wrong.