One thing I really like is that on the bottom left of the screen as you hover over a emoticon it shows what the "Official" name is and then on the bottom right is the key presses that are needed.
I would like to know why the footballer (soccer for the Americans ;-) ) is called "Bartlett" and why the squirrel is "Heidy" :
@tobiefysh guilty as charged. Heidy is one of the most amazing Estonians you will ever encounter and looked after the Skype Tallinn office.
— michael bartlett (@mydigitalself) April 28, 2015
And Heidy can now be found looking after the Microsoft Real Estate! For bonus points her Google Profile also has a member of the Sciuridae family as a profile picture: