Suggestions for a Sig for Rex

I'm about to disappear from the forums for long while again, but I want to make Rex's sig before I go. Problem is I'm not to creative when it comes to making up something for someone. I usually feed off what they give me to do, but since Rex didn't reply to my pm asking for his preference, I figured I'd ask here. Any of Rex's friends willing to give some tips would be much appreciated.

I personally do better in animations then fancy PS techniques but I'm willing to do pretty much anything. Here's the one I did for his Christmas Sig.




And here's one I did for b0schi




And this was for DayaDoll



You could check out my sig thread to see more examples.

Maybe my pm just got lost and Rex will answer here, or maybe he'll just critique what you guys suggest, what ever works.

Thanks in advance for any help guys.