Inflection on the web is tough.  I've insulted countless people (mainly my wife) because my comments in IM or an email have been construed as smart-ass.  You see, I'm relatively new to using Mr.Smiley :-), he probably surfaced into my typing around 2004 I guess.  Who knew he's been around for a quarter of a century.

Happy birthday, Mr.Smiley, you''re 25 years young.

Personally, I've always preferred his nasally challenged cousin, :), there was something more groovy about him (less characters=less complex).  It was a tough road to integrate anyone in his family into my daily correspondence.  I felt like a 13 year old girl.  I'm a man.  I eat beef.  I own a riding lawn mower.  Men don't use Mr.Smiley!

Around 2004, I guess I grew tired of the inflection issue, got over the 13 year old girl complex and adopted him.  Since that time, I've even started using other emoticons and abbreviations, and my wife introduced me to his promiscuous sister, (0)(0)

You can read more about his creation here. 

:-)