My caps doesn't affect my punctuation - if I put caps lock on. Holding down shift and typing does though.
Kelly, I find it interesting you say you find it easier to read caps - most people don't, because the letters are all the same height, so there's none of the natural up and down that means it's easier to skim read without actually looking at each word, because you just see the general shape of the word.
Not saying you DON'T find it easier, just that it's interesting.
Agree with those who see it as shouting - I've been using forums for 12 years now, so I actually read posts in caps in a shouty voice in my head, which makes my teeth itch. I expect I'm not alone in that - which might be why you've had the reaction you have on this thread.
Can you try setting your screen up so the text is a larger size, rather than using caps?
To the OP - Sloane - wouldn't use it myself, Anais, same (prefer Anais).