You're against downloading brushes? Awesome. There are some times where brushes add good texture to sigs, but most of the time they end up being used as a shoddy way to make a quick background.
About your sigs, I really think that the second one is the best. I love the red glow, but I'm really having issues with the text. You made it so small and insignificant, that anyone could just erase it and pass it off as their own. This, sadly, happens and the best way to stop it is to make more noticable text.
The first one is good too. There is also one thing that majorly bothers me though. It's the white light over the guy's head. This washes out the colours of the render and is adding unecessary attetion to the top of the sig, rather than the centre. The text needs a little fixing too. I could hardly read your name behind the Prince of Persia text. Maybe lighten the text a little?
I think that these sigs are really nice and I hope you stick around and make some more for us!
