Yeah, your watermark really, really sucks. Work on that. As for the photos...
1) There is no subject. There is something in focus, but it is not interesting, and the lines in the photo don't really do much to bring your eye to anything. It's also underexposed and a bit flat.
2) Again, work on your composition. She is gazing critically at a pole--a photograph is two-dimensional, so despite the fact that she wasn't doing that, in the photo she is. The lighting in this also leaves a bit to be desired, but that is understandably hard to get around.
3) The color casts are really distracting, and the photo itself is pretty boring. A wide angle night shot doesn't make itself good, it's your job to make it necessary to do both in order to make something interesting.
4) Pretty cliche shot, and I'm not seeing anything that makes it much different. Friends don't let friends do selective color, it never works unless you're doing someone's kitschy baby photos.
5) Your subject is looking off the frame this time. Get closer and make things more interesting--she's sort of in an interesting place, but the only part of the photo that's being used at all is that corner. Also, your subject should be the best-lit part of the photograph, avoid putting what you're emphasizing in shadows.
6) Flat, underexposed, and I'm not sure what I'm supposed to be looking at. It sort of works as kind of an urban landscape, but the pillars stop me from looking around at all.
Sorry if that all sounds brutal, but hopefully this will be more helpful than a bunch of people saying 'sick photos brah!'