I go there when I need to get smileys that I dont know off by heart because of IM. Normally its because I want to make sure I put the right one insted of putting the wrong one & have to edit it so it doesnt look crappy. Perfectionist I guess..
Images isn't really the same as with HTML, you need to put [/IMG] right after it. (except with the  being replaced by those pointy brackety things I'm not allowed to type here if I don't want to mess my post up)