Yeah.. legit ftw!
But I guess I can critique you some more
#1- Favorite of them all. I can see the style your starting to develop. You'll probably get some haters with this style just a fair warning. But. I would have liked to see more of a red-ish orange in the background vectors, same with the name. Probably would make it smaller and put it underneath your renders blade. OR! keeping with the flow of the diagonal lines and making it diagonal and flow with those lines.
#2- It's just not finished to be honest. The background clashes with the render. My focus is turned to the bright green and your name. So I can't really critique it all that well.
#3 I would like to see a brighter background. Your render is pretty bright.
All--- Try not using flat colors, especially grey. Not ALL signatures should focus the render, but a majority of people like to see it be focused on. A lot of your signatures are focused on your name, background and then render. So in your case, if you are going to continue doing so, you should make your name pop out, be less flat, it needs depth, instead of a flat paperlike text. The backgrounds, your doing a good job, just keep trying play around with some other things.
I think since you've now lost Photoshop

I'll try and make a sig with ONLY Gimp, and if you like it, and if you want I could produce a signature tutorial for you using gimp..

I could even teach you how to make it appear to "jump" around by a simple 3 frame animation
Gimp kinda is a broken down, stripped photoshop with some other tools to replace what was taken, but since it's open source, and free. You can find a lot of things for it for free
