I am liking a lot of these too! Especially the universe and planet ones, that awesome prism design in the very center of the first batch, the sun flower, of course the two cats, and the one with the food made me crack up.
In the second batch, I'm loving Lauren's MW&tGG one, Geico's Gecko, Esurance's Erin, Toy Story's Alien Toys, and Marvin and Yosemite Sam. I can see a bunch of these being used by people, especially the ComicCon one and the Milky Way one (for obvious reasons
). I'll love to use one myself eventually.