Just saw the links on this thread - wow, Cliff Hui's entry got 13th in the world! I love it, it really does remind me of a very realistic stream scene, like a great landscape artist. Amano's work is more philosophical, like a post modern abstraction of one's ideal nature.
And then you get your graffiti artists! Which are fun in a Vegas-way, yep there's room for "fun" in the hobby too!
Oh and Tom Barr's dutch scape reminds me of a place near where I grew up called Longwood Gardens. Just knocks you out with nonstop streams of color with striking contrasts...then you realize hey, the infrastructure that supports it is gorgeous too! I just bummed a bit of an idea from the dutch tanks in fact, the idea of an offset from the walls before the foreground plants make an appearance. Helps with not seeing root structure up front.