I lived for a while where bricks were uncommon. I was really excited to move to a house with brick walls.
Yes, they are a pretty dull subject, but they will show one issue clearly: is the lens soft on one side, a clear manufacturer problem. Your camera's sensor has to be parallel to the wall for the test to mean anything. I'd set up a tripod at a reasonable working distance, get the camera level and plumb and parallel, focus carefully (Live View and CDAF if you have it) then take some shots wide open at each full stop through f11. It's pretty easy the second or third time. I like to compare the left and right sides particularily. The lens will not be as sharp wide open as it is at f8. If you have a little time, put the kit lens on and do the same test.
You can sometimes find testing sites or manufacturer data to compare your results to. If they show supersharp corners and you're not seeing that, it might be a problem.
Just shooting in an ordinary way with a lens should work, but it's tough for inexperienced users to judge whether some lens issue or their inexperience is causing trouble. Once you have some confidence in your abilities, brick walls aren't that helpful.