Woot! Woot! I love Alex's art. I have some "edited" artwork of his as my desktop background(s).
Mirrored versions of the covers from Chaos Theory. Right now I'm using these 4 as my bg on an hourly rotation. So once every 60 minutes my bg changes, like a slideshow. I wish he'd do more big face covers like this. Then I could get more characters in there, like Rodimus, Jazz, Ultra Magnus, Soundwave, Sixshot, or even if they ever do another BW book, Beast Megs, Primal, Dinobot, etc.
And my current sig was draw by him for me at the 2009 TFCon.
Maybe I'll get him to do a new one for me this year.