Your sigs are very nice, though I agree with Barker and Hotsauce, you need to work on text a bit. Though text is a b!tch to get to look good....I would suggest, instead of always putting it on top of all the layers, try putting it between layers, and/or playing with the blend modes for the text. Also try things like giving it a stroke, or drop shadow....those sorts of things. Just play around with it 🙂
Yep.
Like the text on my current sig, I used dark red for the color, had it on top of all the other layers, added a drop shadow (opacity 100%, mode multiply, spread and distance of 2), and set the blend mode to overlay.
Also, stroke is good for making pixel fonts stand out, like in Hotsauce's current sig 😄