Keep working. I think these walls would be better if you tried creating some nice render effects and lighting. Also try coming up with some more creative design concepts.
Out of the ones you posted, I like the Kobe one the best.
Just finished up on a wall of my favorite MMA fighter, welterweight champion Georges St-Pierre. Getting better...textwork still is mediocre.
CnC welcomed :thumbsup:
(click thumbnail)
Not quite as nice as the Portis one, but still very good. I agree with Pugz in which I think the render needs to pop a little more.
I'm really digging the style and concept though.