Ringo's avitar has always impressed upon my mind some of the nature of Ringo the man who chose it. The sincere and matter of fact look on the avitar man's face seems to impress upon the reader like, "look man, this is how it really is" even though the man Ringo is imo, sometimes way out in left field ideologically. Whether or not you agree with the man, the avitar seems to command your attention when Ringo speaks.
I do like RAZD's avitar though generally I find these movement avitars distracting to the message and somewhat irritating when one engages in dialog with folks who have them.
I always like NWR's admin avitar since no matter what action NWR took, the avitar seemed to suggest amiability.