My only suggestion is that you be a tiny bit more careful with your typography. Some of them are great, once again your pit avatar comes to mind, but others like your Batman piece really don't need any text. It pulls away from the focus and it's just a little too sharp. It doesn't subtract from the piece necessarily, but it's not adding anything either.
Yeah, I'm not too great with my typography yet. That's something I need to improve on, but I'm not so sure how I can do that. I'm trying to every day, which at least shows that I'm trying. D:
Thanks for the kind words from both of you. It's very appreciated. I'll have some other things up soon, once I finish them.