I would change the colour (lighter), opacity (less), and layer effect (maybe hue, vivid, or overlay) of the border around the text. I also don't really like the photo tabs but if you changed the colour or made them extend past the edge of the sig itself they'd look better. Nice use of colours otherwise though.
I like the idea of the "photo tabs", but as Monarch said, they do need to extend a little past the edge of the sig (the one in the top left hand corner actually looks the best positioned), also bring your text inside of any borders you create. But for early work its a gj, keep up the work and above all enjoy it