Whoah! That's quite the Xenos-Crusher you have there! I'm loving the embossed details and Deathwatch/Inquisition heraldry. I'll have to make an ex-Deathwatch marine in my army based loosely on this. :-D
Time spent rendering, a butt load of reference from minis and other peoples art and a good base pose is all it takes. If you are having trouble with a picture and want a bit of feedback I'd be happy to help