Here you can see a section of my brick wall with a noise textured bump map (below), next to an un-bump-mapped section with the same texture. Looks good - i might tone the bump down a little
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I don’t know, I think the bump as you have it looks good as it is…am looking at the vertical end section…looks bricky to me. 
It’s hard to tell in this shot, but the brick may be to long horizontally on the larger wall area. You might try to make the bricks not so lengthy, which in turn may fix what you don’t like about the bump.
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