well as expected all of Hoser's attempts are cool.
The first one is a great and professional looking, but a bit too un-hammering un-moss -ish.
The second one is too bright and colour saturated for my likings but is really really cool anyway! I love it, its interesting.
The third one looks a bit empty to me. Although again it still looks cool.
The last one is awesome. No complaints here!
My votes, in order:
2
4
1
3