Western smiley are often read from left to right and are seen as faces on their side. In many cases the nose can be omitted such as :) or with the nose :-) or with a rounded nose :o). The eyes are normally a colon : but can be a semi colon ;) to indicate winking or an equals sign to indicate surprise =). Different characters can be used to display other parts of the face depending on which emotion it is showing as you will see in the examples below.

:) or :-) or :o) or :-] or :] or =)	smile.
X-P or X-p	knocked out or dead
:-( or :-< or :-[ or :[	sad smiley face, frown.
:/ or :-\ or :\ or :-/	skepticism, annoyance, uneasiness, or a slight frown.
:-| or :|	indecision, deadpan, a lack of response, or indifference.
;-) or ;) or !-) or ;-p	wink smiley.
:-D or :D or =D	laughing emoticon.
:-P or :-p or :-þ	tongue sticking out: used to convey a joke, light-hearted sarcasm or a light hearted groan.
B-) or 8-)	wearing (sun)glasses.
:-o or :-O	surprise.
:-s or :-S	confusion.
:-B	buck teeth.
:-x	"shouldn't have said that" or I have no response to that.
>:o	angry and yelling.
>:(	angry and sad.
:'( or :`( or :*(	crying.
>:-)	devilish behaviour.
o:)	angel or innocent.
XD	dies laughing.
:->	grin.
:*)	blush.
:-*	kiss.
:-&	tongue tied.
<3	I love you / that.

Of course, there are exceptions to the left right smileys, these smileys are read right side up, as you would normally look at a face.

^_^	another :).
T_T	crying.
(_l_) or (_x_) or (_o_) or ( Y )	a bum.