There are people just starting out in GFX and then there are beginners. Beginners in my book are people who are still developing their skills and still learning. Pro's are people who do it for a living in my book. Good GFX artists are people who aren't really learning so much any more and just make more stuff but yes they do learn a teeny bit more.
Examples (doesn't mean if you're not in here yeah):
Pro's: Vidsecre (I think that's how it's spelled)
Good: Oc, Matt, Lordafi (getting there)
Beginner: You, Mista Rage, Fallen, Vic
New: Lots of people here
You're still learning and getting there. There's a large blurry zone in between beginner and good as well, like elajes is a good example for me (he's on upper level). However if you want to move up more in the blurry abyss then move away from car sigs. Start using render (not anime) and improve on those. Then once you get good enough on those, move to stocks, then move back and perfect renders. Then perfect stocks, then become pro but that's a WAYS away.
As to the sig, the wings are cool but the backround needs work along with the text.