Actually I do have an objection about the rivers, or at least a suggestion: I think the distribution is too equalized. Except for that one area in the Northeast, you've used pretty much the same number and type of river on both sides of the mountains; however, this is not very naturalistic. At the very least, without getting into too great detail about how weather works, I'd pick one side as the one where prevailing winds come from and make rivers more frequent there than on the other side. (Since the number you have is generally good, I'd suggest removing a few rivers rather than adding them.)

That said, I agree that the style of the map is very nice, it will be very easy to read/use when done.