Not a fan of those borders, or the abundance of scanlines in the last avatar. That second avatar could do without text. Other than that, they're alright.
Not bad at all. First one seems a bit over-sharpened. I would suggest using the blur tool to blur from the neck down, and again the torso to give it more depth. However, that wouldn't work well there because of the text. You could just darken it the same way though. For number two, the text is a bit hard to read where it went into the light. You should also maybe get some tiny text brushes or just do something else near it so it's not so on it's own. x) The scanlines are a bit too heavy. Use a layer mask and a 30px (maybe) soft bush on black and brush the skin. And a bit larger brush to brush a little onto the armor. I like the third one, although it's a bit monotonous. May have just been the stock used. Nice. Basically just same with the scanlines from 3. Probably just leave it for the clothes, maybe hair, and maybe the bone. Same again. u.u Not really a fan of the borders, but they aren't that bad. Anyway, KIU! As you said, this is older work; I look forward to newer stuff.