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1 and 2 look like snapshots. They have slightly better than average composition. Nice sunset but there's nothing that differentiates them from anyone who might pick up a camera, turn on the flash and take a picture. You need to get the lighting off-camera for this type of shot. That would be the ideal but aside from that you could also bounce the flash off a reflector or at the very least just bring it down some.
3 - Next time get those lights up higher. Lights coming up from below the face don't make for nice shadows. Also, in this one she has taken on a color cast from the walls more so than the others.
4 and 5 are headed more in the right direction as far as lighting goes though I'd like to see a touch of rim/hair light.