The political map looks good, but the rivers seem out of place. They're really thick, for one thing. I think if you made them hairline-width and lighter it would look better. You may also want to try some really subtle topographic shading (check out nat-geo maps for an example). Are you using Gimp or Photoshop? I ask because a bevel layer style at really low opacity (drawn in 50% grey which is 808080) gives a pretty good approximation of that subtle mountain indication.