There is no ‘best’ type of bathroom tile, as each bathroom is different and each will serve different types of people and families. Bathrooms need to function for those who will use it. So, right off the bat gloss or glazed tiles for floors would not be suitable if the bathroom is going to be used by elderly people or kids.
For bathrooms that will serve elderly or kids, matt non-slip finish tiles are the way to go. Wall tiles should not be walked on… so any finish will be fine. Before moving on to colour/style of tile, you need to work out who your bathroom will serve. Only then can you move on to aesthetics. While on the topic of functionality, some tiles are easier to keep clean than others(dark colours), while some tiles are easier to clean (glazed/gloss tiles)…