As i know u just started photoshop so their pretty good for a beginner..
In the first sig i think that the middle part is a bit too plain.. try adding a render or brushing.. it will look way better! I also don't like the font in both sigs.. you can find some better ones here: http://www.dafont.com
I think the second border is a bit simple but the animation is good.. try using a bevel and set the border to "Multiply".. The first border is better but i dont' like the colors..
Nice Work though as this is one of your first sigs..! I'll rate your next ones..!

[EDIT]: Change the bg on the 2nd one :P