The Demon Hunter, unlike other, more polished classes, feels rushed and incomplete.
I had a lot of trouble choosing what class to play and after a long debate with myself I ended up picking the Wizard instead of the Demon Hunter.
My choice did not come easy, I love the idea of shooting crossbows and bows but after seeing the design choices on the demon hunter I felt that a lot of the other Classes like the Barbarian and the Witch Doctor where much more polished.
What ruined the Demon Hunter for me was when I saw his armor set, it had huge plates of metal on his forearms and gigantic shoulder pads. This is tipically something that a ranged class would not have due to practicalty. I do think it's fine to break the mold of reality and change that but the armor was so extravagant in all the wrong places that it felt more anime then anything else.
My other problem was with the resource system. Now, it's fine to have a dual resource and to be honest it seems fun but the look of it certanly is not. I am not offering any solutions but perhaps a sphere may not be the best choice for this one.
REF [Demon Hunter]: http://us.blizzard.com/diablo3/characters/demonhunter.xml
REF [Resource for DH]: http://www.youtube.com/user/ForceSC2strategy?feature=chclk#p/c/5C2F514ECED855CA/3/_SkYuLq0xaE