i usually use lowercase. i've never liked the look of the capital "I" and have handwritten it in lowercase for years... way before computers were in common use. i've also signed my name in lowercase for over 10 years. for other letters, it's just much quicker. it does have a "soft" look to it too, doesn't it? i didn't know that people left out the apostrophe because of laziness though. i'll leave out commas at times, but not apostrophes. i just thought you all didn't know how to spell! i will only leave out apostrophes when i'm SUPER tired and IMing a friend... nothing public.