The avatar gives me the impression that she's calm and possibly artistic- and the signature makes me think she's intelligent and has a great sense of humor. xd I have never not seen so few double negatives.
From the comination of the signature and avatar, I would definately say that he is quite intelligent and most likely has excellent taste in music.
However, due to a certain... ah... symbol within his signature image...
If I were to come in contact with him IRL, an originally calm situation would most likely turn into an agressive one due to an avid political debate.
Based soley on her avatar, she appears to give this certain "eccentric" and laid-back arua. I'd say she's got a good sense of humor, and is a nice person. The kind of person you'd want to hang out with on those sleepy Sunday afternoons.