I like this tile as well. Very sleek and mod looking. I would consider running it vertically instead of the picture horizontal pattern. It might give the illusion of more height in the shower surround. The color is great. If you are worried about it being "too much," you could always see if they have the same tile in a different shade and mix the two or doing one wall in a contrasting (lighter) color. I personally like it as long as you have good lighting.

There is no downside to putting the grout just between the whole tiles, it's really just a personal aesthetic choice. The glaze does go over the entire tile, so if you don't grout all over it, nothing bad will happen -- the tile is still "sealed" with the glaze-- it's not like water will soak in or something. It's just that one way of doing it will look more like a grid of textured tiles and the other will look like many individual little pieces -- more like a mosaic.

I wouldn't put any water under there because of potential mould issues (in fact, there looks like there's a bit of mould already -- is there?). You could tile the bottom of it and put a strip of LED lights under the glass. What did you have in mind when you initially thought of the idea?

Congratulations to all of you. Its a wonderful platform to be on and you all are doing a great Job. My favourite Design Style is 'Minimal'. I just have this strong connection with simple, subtle and elegant things. Cheers:)