Hmm. . .I use these a lot:
^^
XD
XP
*shot*

EDIT: w00t! 400 posts!

I use XD, ^^, and sometimes :P

:D

:0

^_______^ (or anything like that xD)

xD

and some others..

*bricked*

I don't really pay attention much to this stuff...
I guess i do stuff like this: O_. 0_. ._. O_0 O_O 0_0 ._0 ._O T_T, or anything that involves evil laughs or explosions, like so: *Explodes out of evil laughing*


0_0...

I abuse :D and ^^ most of all, although I used to be totally obsessed with XD and :3. When something confuses me or weirds me out, I use o_o.

I usually uncheck "enable emoticons" because I hate the InvisionFree default ones. All for new custom smilies say "aye."

I don't usually type the exact smileys to trigger the default smilies, which I hate also. To avoid them, I usually use = instead of : for eyes. ^^

I use = also! Down with :!

I use =D, =P, xD, xP, ^^, and *w*

Tensheon, please try not to bump topics that are a month or more old. This wasn't quite a bump, but I'm just letting you know for future reference, mmkay? =)

Let's see. I definitely overuse =D, ^^, and XD. I almost always write "XD" with a capital X, but at Warriors forums, I use a lowercase one, since pretty much everyone else does and it just seems more natural. XDD

I don't usually pay attention, but going back and looking at posts I've done in the past, it looks like I mostly use:

o_o, XD, XP, >D, D<, >(, >[, ):, and x_X

Mostly the first one, o_o

Oooo i like thisa one: *w* It makes you look vicous! *w*

Hmmzerz... Update. lol. I use:
lol
xD
xP
=D
=O
^^
*shot*
=3

... and yeah that's all... I tend to do this a lot too... ... ... lol

I don't use any of those that much, although I used to like using "=P" because I didn't like saying "lol" and I wanted to indicate I wasn't being serious. I do use the words in between asterix's if I feel it is right, though.

Let's see.. I overuse o3o, O_o, xD, x3, 8D, and >D or D<.

And I use stuff like *shot'd* and -isoutofideas-. :3

My most used smiles are probably:

XD
:3
^_^
>D
o3o
:D

Mostly :D and XD, though.

XD

Without a doubt

^__^
8D
=D
^w^
Ü
DDDDDDDD:
>__>
>:
D:<
ASDF
XD
X'D
DX
=/
=)
8)
¬¬
._.
;-;
[/lame]
[/hatesspacebar]
-eats caps-
-smacks with a pink sock-
-turns into a cabbage somehow-
[/wtf?!]
[/Lawl BB code]
[/hyper]

Maybe more!! =DD