How do I bathroom / kitchen / extension? etc.

I just have horror show memories of cork getting sticky and rank. We had cork walls and angled ceilings in the flat when I lived with semi retired pornographer Mike Hunt and Hiro, but that's another story.

Tiles also sounds horrible in terms of shit getting in the cracks even with semi regular attempts at cleaning (wait til your offspring starts eating solids and you'll want a solid surface too).

But am open to be convinced - link to good ones?

Plastering though can fuck off.