The first one is my favourite, your blending on his arms is very, very good.
The second one is nice too but the colours are a bit too monotone, which is OK sometimes, but for this one, you might want to add a C4d or two in the background just to bring out some colour, or try adding a gradient map.
I don't really like the last one, it's just too busy and a lot of C4d's stuck together.

All in all you have great blending, and you have a good style.