Avatar...
Skink, because he is creative and changes it up all the time.
Dusto, because I dig that goofy retro spoof shit. PS dusto your old av was slick too.
Same goes for my av, why I picked it.
TGF's old 'rar' av made me giggle
And who has that 'going to the moon, brb' av? That cracks me up.

Screen name...
Its A Plant because... durrrr... it's just a freakin' plant.. . WTF is all the fuss about!

Sig...
The Yeag... Just because... ROFL that is the most disturbing mental image...