hey man, thanks for dropping by my SB, you're improving so frikin fast its ridiculous haha. the figure studies are an awesome idea btw.
um..some crits, try not to rush the studies...whats important is what you're getting out of them not how many you do don't be afraid of the same pose twice or more if it doesn't look right to you. you could even flip the page, and try drawing it again from memory, i heard that helps it stick.
Also, try remembering the proportions and facial anatomy structure from your studies when drawing from imagination, i can see you often sort of switch to a slightly different mindset when drawing faces from imagination, try to base your stylisation on the anatomy knowledge you gain from your studies.
lastly, is there a white balance option in your camera? you might want to set it to the tungsten white balance option (the one that looks like a light bulb) pretty commonly found in cameras these days when taking photos (for situation where results look way too yellow/warm).
keep working hard man!