Easy to make? Good. When it starts to feel easy to make stuff, that shows that says that you're beginning to grasp how of the concept. As far as the things you we adding to it, the first thing I find to point out is that your border is uneven along the top. See that spot right about Sasuke's head? Also, now that you've figured out how to do standard borders, how bout you see if you can find a new creative style for doing borders? Also, the font's a wee bit plain. Try exploring with fonts that'll fit better with the rest of the signature.
Download fonts | dafont.com
^ All of you might want to consider looking through that site for a few fun fonts. It has a nice big selection there and fonts downloaded should work in Paint. (Or at least in Windows XP they do)
*pokes Chari* How ya doing with that banner assignment?
Lemme know if it's too much for you to handle.
Also, all of you can feel free to give feedback on things that the others in this class make. If there's any little things you're noticing that could be done better in another student's signature, go ahead and comment on it.