p_b?
He's just this guy, you know? He has many notable attributes, and one of the best is that when you abbreviate his username like that it looks sort of like a quizzical, slightly apprehensive but generally optimistic face.

p_b

See?
(MooCow_Byter, Sat 16 May 2009, 5:01, archived)

Haha, that little guy is so expressive.
p_b

When I focus on the p he looks a bit sad, but then I just have to glance at the b and things seem brighter. The underscore in the middle sort of balances things out.
(MooCow_Byter, Sat 16 May 2009, 5:07, archived)

contrary to internet rumour, I've never been balanced out with Underscore in the middle
but hey, I'm broad minded, don't knock it til you try it, great stuff
( Gilgamesh gazed in wonder as Frampton came alive, Sat 16 May 2009, 5:21, archived)