Like anything, smilies should be taken in the context they are given. For instance,

might mean I think I'm really cool, or it could say I'm wearing a red hat and smoking a pipe (as usual). The reader would have to check my words to decipher my meaning. Likewise,

probably equates incredulity, but maybe it just indicates that I've smashed my finger in the drawer (again). I'm never sure about

. It looks like its supposed to be a wink, but it looks more like I just got poked in the eye and I am happy about it. That's just wierd.