I like the high-altitude lakes. That's a feature I've not seen on many maps yet.
A suggestion to help your features blend together better: Try feathering the edges a bit. I don't know where that function is found in Photoshop; I haven't used it very much, but I used to use it with great frequency in Corel PhotoPaint. It will keep the peaks and ridges crisp but blend the lowlands into the flats.
Overall, I like your awareness of different biomes--I also noted the glaciers in the south. Good job!