1) My eyes are drawn to the silhouette of the tassels. If the blue glass is your subject, maybe move to your left & up a bit, and zoom in a touch to remove some of the distractions.
2) She is too cute to be a vampire....do not cut off her head...
3) I like the foreground composition and atmosphere, but the background is WAY too busy.
4) What was your subject?? If is was the desolate, barren little tree, then isolate it and make it lonely. Move down and give a little bleak background to accentuate your subject, but not enough to overwhelm it.
5) I like this one, very interesting composition. But....either crop or clone the ear out of the bottom
6) Oxymoron (no, you're not an ox moron

). Red Bull is an energy drink, yet you have it depicted in a very drab manner. Good lighting & focus, DOF not bad, and, yes, some of the bottom needs cropped.
And... BIG kudos for taking all of those in manual mode.
Keep shooting, and have fun
