learn how to use DOF to isolate your subject ( #2 and 6)
make sure the shot is in focus correctly (#12 and 13)
and dont center cyour subjects (#7)
all of the night shots look like snapshots to me.
when shooting water try to set a longer shutter speed to give the water a more milky smooth look
some of these have potential, but take control of your camera and use it to its max ability.