We agree with the previous comment. Mirrors are a great idea. You could also add a piece of artwork too.

Hi Fiona, you could definitely feature a mirror above your sink. Lots of people are using round mirrors in bathrooms as an alternative to a traditional looking design. Like this below

We have lots of mirrors available on our website that would look great in a bathroom! http://www.exclusivemirrors.co.uk/ 

Hi Fiona, we designed this ellipse mirror with led light behind.

Netherhall Gardens Apartment · More Info

Why not add some texture and colour to this wall that blends in with the tiles using Venetian Plaster? Venetian plasters can give your space a bespoke face lift, giving it a luxurious and fresh appearance.

dont know if you have already chosen accessories but have you thought of going funky with a bright glitter paint or perhaps frog taping a design and choosing three or four colours and match your accessories now that would be funky