Colours. There are unlimited colours to pick from too with bathroom basins so take your time to find one you really like. There is no right or wrong choice so find something that works well for the look you wish to portray in your bathroom. This is a change that can be part of a huge remodel or it can be the only part of that room you plan to change.
The Edwardian and Victorian styles of the time are still a popular choice today. They look exquisite in a villa or cottage bathroom and never loose their appeal in terms of design.
Pay Attention to Size. If you plan to use the same insert location where it already is you will need to shop for bathroom basins that fit that same size. You will also need to get one that is the same shape. Some are square or oval while most of them are round. If you want to completely change it up you can go with a different size and shape.