Emoji is such a weird thing. On one hand, I use them constantly for IMing. A quick 馃憤 is 10x better than the single-character "K" response in terms of expressiveness and playfulness.
On the other hand, the symbol coverage seems very random to my western brain. For example, there are three different mounds of rice, but no tacos. Nine different commuter trains, but no motorcycle. Also, the seemingly random assortment of flags.
I know this is a result of their Japanese origins, but if I had my druthers, emoji would be a little more inclusive, and then phones would have a little emoji-editor where you could edit your keyboards so they only included the symbols you wanted to use.