1 - I almost like the conversion but it's a bit too light and she's fading into the background a bit, and her mouth is open like it's mid talk and kind of awkward.
2 - Why didn't you have her look into the light? Her face is very dark and no light in her eyes at all. A bit orangey looking.
3 - It would be better without the fake blur. I rather like the shadow.
4 -
? was this a major crop out of a much large picture?
5 - I would have had her lean and him stand straight, because he looks way shorter than her. I like the overall composition, but I would have had them even slightly more to the left of the frame since the wall curves so nicely.
6 - This is interesting. I would pull back your blacks/darks a little bit because we're losing detail there (especially her hair).