Gee, I hate to poo poo after all the praise you got but.........

In the real world, very few things have such sharp edges. The design is nice, but the modeling has a lot of flaws in it.

A huge improvement in the basic design could be made by either beveling some of those surfaces to get slight rounded edges, or detaching some surfaces, moving them out just a touch and doing a free form fillet to put a slight bead on them.

rounding of edges go a very long way in making objects look realistic.