air looks more like a snow elemental, the colors should be more windy (but i've got no idea how to do that) nice reflections on water, and earth has too many grass blades on him.
generally, truly nice.
Wow, very awesome. Same as below and I would add differeent things to represent the elements i.e. trident for water, craggy rocks in the fire guy maybe an axe for the earth dude. A preview containing the head would result in more views, also resulting in more usefl tips so you can be a better artist!
Best of luck,
B.D.