Ok, I've sent a PM to ElectroMaster regarding addition of some more beautiful smilies in the forum for making the contents more expressive than the currently availables(Do you feel the smilies you're using are accurate?). That will be a good addition IMO. Vote here if you really like this idea.
They're not used all that much, and they're not really required for conversation, more of an amusement rather than something that actually benefits communication. I think the current set is fine, and if you want you can always do inline image links from other sites for your own smileys if you want.
Not really necessary, I agree, but why not?
Maybe add a smiley/saddie with a graduation cap for those looking for us to complete their school projects!
In my opinion, it would just make some posts more confusing than need be. I've never felt "I wish I could use 'that' smiley right now". Maybe I'm wrong, let's see how this poll pans out.