the long face on the 1st one makes for a nice afect on background. Nice work for starting.
The second one. Good concept.. Love the wings.. very intresting afect. I like the grass also.. was that composited with Photoshop or done with paintFX. just gessing there.. the female. looks good but her perportions are to long if you ask me. the arms and belly. You could use lattesis to shorten them with out having to tweak a lot.