There are literally thousands of different kinds of tiles: wall tiles, floor tiles, mosaic tiles, natural tiles etc. You could choose an old-fashioned Dutch style based on traditional Delft blue ceramics, or a sleek modern style in a black-and-white design.
If you’re going to tile a floor which has not yet been earthed, you should always add a thick strand of tinned copper wire for this purpose. The wires can go all the way to the meter cupboard, but any work in the meter cupboard itself should be done by an electrician!
Novo does not recommend that DIY enthusiasts do the tiling themselves, unless you’re really an experienced tiler and do it on a regular (weekly) basis. Getting a good result is a matter of skill and experience; even an experienced tiler who is out of practice is less likely to get a perfect result.