I love your photos. Coming up with a challenge has been a challenge on its own. LOL So, I see a few photos of people, but not many, so I challenge you to take some photos of people this week, but not typical 'portrait' type photos. I look forward to seeing what you come up with. :)
Though composition and bokeh are great, as mentioned above, the exposure could have been higher (while shooting or in the postprocesing). I think quality improves then: http://jaapmeijer.com/images/2012/kathy-roses.jpg