Interesting idea, but it would be harder for me to remember 30 characters of emoji on a keyboard I don't routinely use than 30 characters of text and symbols which have, to me, some internal order, on keyboards I have used for the past...18 years?

I don't know how you get to the emoji keyboard on iOS. It would also be a little annoying having to do this on multiple platforms (I have considered using 1p on Windows at some point; no real argument that a well configured win 7 or 8 is worse than OSX, now).