I’d say it’s probably 70/30 on iDevices vs. MacBook. Most of the MacBook Air time is work-related. And that figure is so heavily tilted in the iDevices favor because I use the iPhone far more than any other device.
That said, when it comes to “general computing”, I much prefer to use the iPad Air (with the Logitech keyboard) for almost everything. But I suspect a rumored 12” Retina MacBook Air could tilt the numbers back in the MacBook favor, if only temporarily.
Tim forwarded your email to me. We agree with you. Our emoji characters are based on the Unicode standard, which is necessary for them to be displayed properly across many platforms. There needs to be more diversity in the emoji character set, and we have been working closely with the Unicode Consortium in an effort to update the standard.