Instead of constantly fiddling with different versions of various images for each project, I decided to post some examples, get some feedback, and work from there. I've got the sigs and some avatars here, although due to my having to use a Photobucket account for these at the moment, I'll have to find another way to get the sprays to people. Again, I'm sorry for the amount of time I'm taking for these, but college seems to be sapping more of my time than I originally thought it would.
Asal:
Your idea was simple and descriptive enough for this to come to me pretty easily. Although if it's not quite what you're looking for, be sure to let me know. The spray is ready as well.
Seth:
Simple enough to work on the avatar. I lightened it up a bit to make it more visible. I've got the spray ready and waiting.
Cartman:
This is what I came up with so far. With the oily grunge brushes, I thought it looked nicer to save space and make the text animated. If you had something else in mind, let me know, and perhaps send me some images of how you want it to look. I really would like to do more work on this one, as I'm not quite satisfied with myself on it because couldn't think of much else to add.
Fo0l:
I can do more to it if you want, but I thought anything else would start messing up the image.
Sustained:
I've got some ideas of frozen stuff to use in an avatar, or perhaps the sig if this one isn't enough.
Kodiac:I've got your spray ready as well.
Legionnaired: Do you by chance have a cleaner image of Buddy Jesus? The one you've linked is a good shot, although it's a bit of trouble trying to clear away the scenery around him.
CorvusX: I'd like to see your old sig; I remember seeing it once before it was removed because I could probably get some ideas from it, especially if you created it yourself (allows me to see what the creator was going for, helps me get ideas). Or if you'd like to give me some examples of the kind of evil birds you want.
Anarki: Not quite sure exactly what to do for a new sig, I'll need to speak with you about that to clarify some ideas.
GrayDuck: I'll need a bit more time to work on your sig.
Once again, I'd like to emphasize that, even if I am satisfied with a project, it isn't completely finished until the person I am making it for is satisfied. Your feedback would be very helpful, as every project I work on helps me learn something new about what I'm doing.