Also agree with Deadshade. That's something I wouldn't have noticed, but once it is pointed out, it does stand out a bit.

The other thing - and this might be a matter of taste - I would consider making them look more rugged. I think the key to doing that is in lights and shadows, and the lesser ridge lines. Your mountains are quite elegant and can give your map a nicecstylised look (and this is why I say it is a matter of style), but if you want less stylised/more realistic, then they need to look a bit messier. I checked out the Alphonso Dunn video that Scrit supplied, and while I don't completely agree with Dunn's approach, it nonetheless can offer good insight into drawing realistic mountains.

Definitely getting better, though.

THW