Pretty good tag you got there buddy, just a few small errors you've made that are bringing it down .

Okay, for one thing nice use of C4D, you've placed them really well although they stand out a lot and become a major distraction. I'd try to focus on your lighting here. Try to angle it from possibly on the right of him and darken the sides.

I would also suggest you bring out your colors so the tag really has a 'wow' factor to it.
Mainly just blending and bring out those hidden colors !

Kiu!