Well, you certainly have picked one of the great mappers to inspire you. And i really think that your map has a torstan-vibe (torstan is his CG name). So, well done!
I am not a big fan of the forests when i look at them in full zoom but that is very much matter of taste. I do think though, that your rivers need work. The color is off (imo) and they look more like "snakes" lying on top of your map. Also, some of your rivers have...improbable courses (i'm especially looking at the Dreary Run).
I do like your continental shapes (always a very important part to me ).
All in all a very fine map!
Care to elaborate a bit on the world itself? History, Races, what kind of era is it in (medieval, renaissance, ... ) etc. ?