I know a few girls into anime etc who use :3, >.>, and =3 but the other two seem to be used by a variety of people. The xD one probably came from anime but in normal use tends to be 'one above' the normal excited face, so it goes:
-> -> xD
-_- is one I've hardly ever seen from them though and more from other people. It's just like a straight annoyed face?
Is freshers still worth it?