Sampling tiles in the bathroom (size, arrangement, height)

Hello,
I bought a condominium last year that is currently under construction through a developer, and in a few weeks the selection of materials will take place. The apartment is initially going to be rented out.
Attached is also the plan of the bathroom. According to the building specifications, I am allowed to choose tiles up to €60 including VAT, and about 60% of the wall area in the bathroom may be covered with tiles. Otherwise, I would have to pay an extra charge. However, I have no idea how large the tiles should be, how high they should be laid, or in which tile pattern they should be placed. I would appreciate any advice. Unfortunately, all the stores are currently closed, so I can’t get any inspiration there.

At the moment, I am planning dark floor tiles and light (cream/beige) wall tiles (both ceramic) in sizes 30x60 cm or 30x90 cm. The tiled area should be about 1.20 m high, whereby the left long wall (4.12 m) does not have to be tiled at all except for the skirting board. The shower area should of course be tiled all the way up. For the area of the washing machine and dryer, I don’t know if it makes sense to tile all the way up there. What do you think?

Which tile size would you choose for the walls in this elongated room? Stretcher bond? Third bond?
What size for the floor tiles? Would it be better if the floor tiles (if rectangular) were laid crosswise, or must they always be laid parallel to the wall tiles?
The hallway and the storage room are also going to be tiled. Maybe there’s something to consider there as well.

Thanks in advance.
I hope it is allowed if I post a section of the plan here. There is no information about the creator in the section.

Best regards
Robert

You really can't go wrong. It's a matter of taste. I would choose elongated tiles and install them vertically. This visually stretches the room upwards. Personally, I don't find the third bond pattern very appealing. It reminds me of office floors. I wouldn't want that in the bathroom. There's no need to tile the area around the washing machine. But you can do it if you like it. I would definitely lay the floor tiles horizontally in the narrow room to make it look wider. Show me the tiles you've chosen.

Thank you. I haven't seen tiles installed vertically yet. But it sounds interesting. I haven't picked out the exact tile (colors) yet. It should appeal to as many people as possible color-wise and look elegant/modern.

I had my shower tiled vertically. I am attaching a photo. However, the tiling was done very poorly and everything will be redone. So, what you see here is not the be-all and end-all. ;)

Search on Pinterest for "langes Bad" Or/and on Google Image Search. You will also be shown the matching furniture right away. I was just in there: I couldn't decide, so many great and special bathrooms with stylish tiles. You can emphasize or hide the length, whichever you prefer. Every format has its justification.

The stores are unfortunately all closed at the moment, so I can't get any inspiration.

That is really extremely annoying at the moment, for us there is also the long drive and hotel stays are not possible. Regards Olli