I love the bokeh, especially in the last one. However, I'd stop down your glass just a bit to make sure she's in focus better.
IMO you did a very good job with composition.
My guess is you were using available light. And if you were working with graininess it might mean you underexposed your photos. Try a reflector or off-camera flash to help with the exposure and like patcave said catchlights.
Do you have a website or DA account where you'll post more photos?