Any silhouette with colour around it is one that I personally like. The yellows are the 'maybes' and the red indicates 'villains', the green the 'good guys' and blue is possibly neutral.
I'm feeling a bit stale at the moment so I think I'll have a go at making my 'wheeler' silhouette creepier, it's a little too much like a squashed deer at the moment. I have a distinct lack of villainous silhouettes, or maybe I should just have one super evil one... Any feedback will be great, whether it's about merging two together or making something completely new. All help is appreciated! :D