Hah, it's not a lack of imagination. I've been through almost every kinda face there is. xD I just.. got tired of most of 'em after a while. I think they turned too silly for me when my humor turned more to wittiness and sarcasm and jokingly insulting people.
Snap, that reminds me. ^0^ is another one.
It's like. Sarcastic exaggerated happiness. ^0^