I am glad I didn't start this thread as a competition, I have little to compare with some of the images posted here so far.
Here is one of my favourite Pentax B&W images, sorry to say it was shot on b&w film using a K1000 and my M 50mm f1.7 before digital came along. I call it "Mother-in-law door".
And here is a digital image shot with my DL and kit lens at 18mm.
I am enjoying this.