That's pretty rude. Then again that's to be expected. Infinite your work doesn't suck, I've seen FAR worse. I just recommend reading up more tuts and gaining more experience before trying out for a crew.
your sigs are too corny and somewhat mainstream. do like all the other proes, create your own style, stick with it, and be creative, learn some things from tuts, ofcourse, but dont forget to use your own creativity.. gl