Best tile pattern and grout width

[NotAgainFFS]

I'd appreciate some advice please. Tiling wet room walls with 300x100 white ceramic tiles. Walls are plaster skimmed and tanked and aren't 100% plumb or straight. I fancied using brick pattern but have read the walls need to be pretty straight. Also wondering what the best grout width would be. I'm using gunmetal grey grout.

Thanks!

 

[PrenticeBoyofDerry]

2mm grout lines, if walls are miles out, will be headache with which ever design you use, so brick vs standard design would be no more difficult in that respect.

 

[NotAgainFFS]

The walls aren't too bad. I checked them out last night more carefully. A couple of areas near the corners. I'll try a couple of rows and see how I get on.

Thanks for your reply.