I'm in the same boat as Richard wrt the brick finish but would echo his sentiments that this is down to personal taste. However the crispness of the execution and the overall affect you have created looks fabulous and in fact the exposed brickwork create an extension of the black-white pattern one sees from the contrast between the wood, the furniture and the worktops!Of course, you're almost certainly right. The tulipifera name probably derives from the tulip like leaf shape, as you say, hence the common names of tulip wood or tulip poplar.
I meant to say, but forgot, a cleanly executed job with the architrave by the way. I was also impressed with the extent and neatness of the kitchen build you illustrated in another thread.
I think my only aesthetic ho-hum (code for not keen) is illustrated in the fifth picture down in your opening post in this thread where bricks peek through what I think is some sort of white plaster material. It doesn't work for me because it's neither an interesting all characterful brick, nor an all plaster finish, which could be either smooth or textured. In the end though, that's just my opinion and reflects my personal preferences or prejudices. And my preferences and prejudices are surely no better than yours, ha, ha. Slainte.
I'd pay good money to have a kitchen like that - well done!