Watercolour Practise Paintings of Faces

I was practising faces again last night and decided to do them purely in watercolour.  Usually it's pencil or more recently using a Lamy Safari fountain pen. 

I wanted to practise painting faces with more expressiveness and at different angles but the facial features (especially the eyes) were giving me trouble.  The paintings below are the ones I'm happiest with but obviously I still need practise.  It was actually fun using just one mixture of paint I had left over from another painting to do the subtle shadings and the whole face.  I think I'll practise quick sketches in watercolour again since I had so much fun with it this time.