
Ami-chwaaaaan!
Out of curiosity, where do you pull the backgrounds for the sigs from? In some of them you can make out things like text or a window frame, leaves, et cetera, but overall they seem to be... how to put it... "hand-crafted", for lack of a better word. Are they hand-drawn*, or are you throwing effects together on existing material to see what looks good? I'm completely non-image/video savvy, so I really have no clue.
*Loosely speaking. Hand-drawn, tablet drawn, et cetera. Anything not pulled from an existing source or sources, really.