Watercolour is a wonderful medium, and because it is translucent, it really lends itself to portraits. You can get a lovely feeling of a living being from it. Often people choose a watercolour in just one colour like sepia, or they might prefer a portrait incorporating lots of colours. I am very happy to discuss the colours you would like to express the personality of the sitter. They can also reflect the room where you would like to place the painting.
I always do a preliminary sketch for you to look at, before going onto a final painting. Many people also like to buy the sketches as well as independent portraits. This is completely optional, but if you like I can build the sketch into a coloured pencil portrait, which people often like as much as the final watercolour.