When I was younger and first became a furry and went exploring on IRC chatrooms, (I identified as a coyote back then), I would use the name 'ShadowCoyote' and started noticing there were many others with similar names. Finally, one furry like PM'd me and was like, 'hey, get an original name!'
The lesson here is that using 'shadow' in a name for something, though cool sounding, is highly overused. x.x
My name now is pretty generic but I haven't met another ComposerFox yet (though many foxes that composed) so until I do it's all good!