Thanks for the suggestions so far. A lot of these compositional and technical errors I wouldn't have thought about! Like the window frame for #2 and the nostril thing for #3.
I am going to make an effort to pay more attention on lighting, especially fill and look out for distracting background elements in my composition. The DOF is a tricky thing because of shutterspeeds and films (I shoot low ISO in subdued light often) but I will try to be more aware of this and maybe use a tripod (these are all handheld).
I guess it is important for me to think of what emotions I am trying to evoke and convey. It is a little different everytime but I'm not really deliberately going for fashion, glamour, or a conventional portrait. I have to think this through.