When I read your impressions of the smileys, I come to think, how many people I may have offended by using them.
To me : rolleyes:, for example, means a) I'm acting/ I have done something silly/stupid b) the thing I'm talking about is silly c) sarcastic d) something else depending on the context. But I'm always using that smiley with friendly thoughts i.e. I don't want to offend anyone.
I use : ( to describe sadness but I very often replace it with : confused: since it looks less devastated.
And finally this one

. I for one use it quite lot. Since it seems to be smiling while sticking it's tongue out, I think it's a friendly smiley. I use it to describe same feelings as I use : rolleyes:. Phew, what a mess! I apologise if I have offended any of you...I'm quite sure I didn't do it on purpose

(<-- Now this smiley tries to tell that I'm unsure if I have done something stupid)