tsk, ignore those who don't like your colours, they aren't forced to read it after all,
(but know that people with colour blindness or poor vision might have problems with fancy colours)
Likes are similar to facebook likes
they just mean you like something
The star is used for giving "reputation", a sort of private like , or more like saying "that was really well/ wise said) or something.
the triangle with the exclamation mark is used to report a post to the moderators
oh, and
Welcome