Tiling - stickler for detail

Moving right along, the Building Contract has now been signed, QLeave Levies have been paid and the BSA Insurance Policy is in place. The builder has penciled in a 10 June start date - Woo Hoo.

I am still struggling to find the "right" wet area tiles locally, so some samples have been sent up from Melbourne and Sydney. One is a hexagon Grigio Marble and the other is a hex Bluestone (both are very similar) but there is about $100 per m2 price difference between the two:

Luckily there is only 9 m2 of floor tiling! And speaking of tiling, there was a slight issue that cropped up during a previous renovation, so anyone who is about to renovate their bathroom, please take note:

MAKE SURE YOUR WALLS ARE PLUMB

When the Tiler got on-site, he discovered that the bathroom walls weren't plumb. Now this normally isn't an issue with walls that are covered with plaster, but it can create a drama for a Tiler, particularly  when the walls are being tiled from floor to ceiling. Unless the tiled corners are plumb, you'll have tapering cuts or mismatched grout lines where the planes converge:

Our Tiler was very experienced and spotted this potential problem from the get-go so it was sorted out promptly. The finished result was spectacular - his work was absolutely meticulous and his attention to detail unmatched.  His work is the best I have seen, and I have requested that he do the tiling in the new house. (If anyone is looking for a Tiler, I would thoroughly recommend him.)

I am one of those people that walk into a bathroom and scan the walls and floors, looking at how the tiles have been laid and making sure the grout lines all match up. (Am I the only one who does this sort of thing?) The smallest of discrepancies stand out like a sore thumb, so the tiling in the new house has to be perfect, otherwise it will irk me forever. Do you ever critique other people's handiwork?