This is my first model rendering in cycles. So I hope you critizice me, and maybe even give me some useful advice. Thanks. 
The blades are not very shinny.
Also, add an image to the world, so that the blades do not reflect a solid colour. Tutorials are on YouTube for that.
Thx for tip ! 
Yeah, it needs an HDR light probe to make the blades look really real! you can get free ones all over the internet! But nice scene! Great work! 
the green, purple and golden materials must to have more roughtnes, You can play with the values og the gloss and the difuse. I think the blades can be ok with an environment texture and some scratches.