This painting is very expressive, in a subtle and refined manner. A good choice of colors (tones of green and blue) complement the hue of the woman's face and bring new depth to her qualities, emphasizing her features. She is central to the painting, and her features are powerfully depicted. A comment below spoke of a contagious smile - indeed it is!
The painting could do with more detail and precision, as seen in the contributor's watercolor works. The left earring*, the eyes(hadow), the right ear, the (lower left part of the) nose and the (right part of the) forehead seem to have been hastily painted. Likewise, the purpose of the frequently used "drip" effect, used in many works by this contributor, is, for me, not clear in this particular work.
Overall, I find the impact of this painting to be great and very successful, albeit the fine details could, should and will be more refined with practice using this technique. For the experiment it is, this is a very successful piece of work. Thank you most dearly and keep on keepin' on!
--- *from the woman's perspective, not the beholder's
The very first thing attracted me to this piece is its vibrant mood. I believe that a painting; any painting must first express what it intends to. This painting to me is a reflection of how you wish to see your sister; happy. Full of color, vibrancy and freedom, it is a good example in how emotion guide you to paint.
As for the technique, detailing etc. I feel in any painting they can play a secondary role. To me what matters most is this question:
Does this painting hold my attention? More importantly, does it touch my heart? This one does.