I like this one. 
(note: I don’t know who’s male or female here, this is just what I picture when I read the username, I had nothing better to do this evening being home with the flu
)
ShibbOleth - one of those large hairy Lovecraftian beasts from the Quake game.
wakimika - a crazy and fun loving Finnish Grand Prix driver.
SanguineSpider - I picture the spider out of Return of the King relaxing on a tropical beach with a cocktail with tiny umbrella in it.
ObsidianFlutterby - One of the monoliths from 2001
Vunderbob - A dashing German WW1 fighter pilot, silk scarf thrown over shoulder and about to climb into his plane.
Kalhoun - A ruggedly handsome Irish warrior running over the bleak mountain peaks in ancient Ireland.
Phlosphr - A dark and mysterious mythical bird. (no idea why)
Tuscalan - A mighty and ferocious battle. “The Battle of Tuscalan”
Dangermom - A female Dangermouse.
js_africanus - Some sort of exotic African beast, like an antelope.
Deadly Nightlight - A feared and respected female Asian assassian/martial arts expert.
emekthian - The Mekon from Dan Dare.
luluBahrain - A dark and sultry Arab maiden.
BobLibDem - A completely bland and non-descript American presidential candidate, what you’d get if all the Democrat canditates were rolled into one person.
gum - A Yorkshire farmer.
Steelerphan - A mercenary fighter pilot, tough and completely amoral.
BiblioCat - A humanoid cat working at a library. Obvious I know.