while we're talking about the orthagonality of people's comments, I have one to contribute!
This is the second of your posts I've read in an hour with a b^) (checking your history shows at least one more) and now I'm curious. I've never seen that face before. The first time, I assumed it was a carelessly-executed B^) "2cool4you sunglasses wearer grinning sarcastically," but I guess it's not. My best guess is that it's winking - but winking is usually light-hearted and seems odd paired with the ^) nose/mouth that I associate with black comedy/sarcasm.
If ^) is light-hearted to you, I'd guess "quirky, almost flirtatious wink and grin." If it's not, I'd guess "smirking, exaggerated and heavily ironic wink." For people I know well, I could probably tell which one they meant; for strangers on the internet, less so. Is either interpretation close to the mark?