SCREAMING vs talking
it's true, believe me EVERY TIME YOU FAIL TO USE YOUR LOWER CASE IT SOUNDS LIKE YOU ARE SCREAMING. BESIDES, THAT LOOKS RUDE. Wanna double-check? Ask any friend of yours. capital letters are great to emphasize a word or even a sentence. When your entire paragraph is in all caps, well, there's no better way of saying this, but that just looks annoying...