Laughter
:-)         Humor
:-) (-:     Masking theatrical comments
:-T         Keeping a straight face (tight-lipped)
:-D         Said with a smile
:->         Alternate happy face
:-) :-) :-) Loud guffaw
:*)         Clowning around
:-?         Licking lips
%-}         Silly

Sarcasm
:/)         Not funny
:-"         Pursing lips
:-r         Bleahhh (sticking tongue out)
:-f         Smirks
:-p           "
:-1           "
:-,           "
:-|         Disgusted
:-J         Tongue-in-cheek comments
:-!         Foot in mouth
:-$         Put your money where your mouth is
:-D         Talks too much
:-I         Chewing on bone

Anger
%&$%&       You know what that means...
:-P         Shouting
:-y            "
:-o            "
:-(         Unhappy
:-c         Real unhappy
(:-&        Anger
(:^(        Broken nose
(:<)        Blabber mouth
?-(         Black eye
%-)         Broken glasses
:-b         Tongue stuck out
:-p         Left-handed tongue stuck out

Sentiment
>--->---    A rose
||*(        Handshake offered
||*)        Handshake accepted
:-x         Kiss kiss
o=          A burning candle to start a flame
~=          Flaming message
-=          A doused candle to end a flame
|-<>        Kissy face
[]          Hug

Conspiracy
(-_-)       Secret smile
'-)         Wink
;-)         Say no more; nudge, nudge
:-*         Oops!  (Covering mouth with hand)
:-#         Censored
:-8         Talking out both sides of your mouth
>:>         Leer
:-X         Not saying a word

Despondency
(:-...      Heart-breaking message...
:-o         "Oh, noooooo!" (a la Mr. Bill)
#:-o        Same as previous
...---...   S.O.S.
:-<         Forlorn
|-(         Late night messages
(:-$        Ill
(:-(        Sad
%-          Hung over
:~/         All mixed up
#-)         Another all-night partier
:-'|        With a cold
%+{         Loser in a fight

Astonishment
( )         You're kidding!
<:-O        Eeek!
:-C         Unbelieving (jaw dropped)
:-(*)       About to vomit