As others have said, #1 is too cluttered, but I don't think the subject itself is bad. I tried my hand at salvaging it. I cropped out most of the foreground, and applied a bit of blur to the background and what was left of the foreground. I desaturated the greens and blues a little, and the red a lot. The highlights have been reduced a bit.
Each change was aimed at reducing clutter, and I think this is a somewhat better result.
#2 is good, but very noisy. In the dark you should set up on a tripod so you can lower the ISO and use a longer exposure. Even handheld, you could probably have used about half the shutter speed.
#3 I feel leaves too much of the frame out of focus. Maybe position yourself closer to the wall and branches so they take up more of the frame.
#5 could be good, but I feel like you could play with lighting more to make the subject really stand out. Much easier if your camera can shoot RAW.
I like #6.