I'm intrigued by this thread.
I personally (when reciting the alphabet) say "aitch", yet when I use the letter in a sentence I quite meticulously pronounce "haitch" BUT only when its appropriate ("Her's compared to Hour for example.)
What interests me is, for those being so adamant about "aitch", would you pronounce Here as "ere'" or correctly as "Here"?
No, because the pronunciation of the name of the letter has nothing to do with the pronunciation of the letter in a word. Do you try and pronounce all words starting with W as if it started with a D?