>>3498604Sure.
Bridge: The lighting in this photo is nice, but the angle isn't really great despite making the bridge seem somewhat dramatic; generally big things seem more dramatic with a wide angle any way - this can get gimmicky. The building on the left is intrusive, as are the street lights and cars/people down below (they don't fit well here). This isn't to say the building/lights etc couldn't be used skillfully, but here they seem extraneous.
Flowers/door: Weird colors in the flowers, bad framing of the door. And it's just a door/building covered in foliage, nothing really spectacular. A potentially moody shot with little mood, partly due to the flowers. No context.
Two guys: Really bad colors again. Did you do this? The composition is way off; don't be afraid to aim your camera at your subject more directly, don't point away towards nothing. Honestly I'm not interested in their expressions as much as I am in the gesture, then again a handshake isn't always interesting. In that case though I would have tried to get closer and put more focus on the hands - unless their expression/characters were of interest. Here's a photo I think is a really nice photo along these lines, by Curran Hatleberg.
Protest: This has more energy than the other, and the sign is nicely placed, though maybe I would've gotten closer and changed the camera's angle slightly to point more at the sign. Not sure though - maybe there could've been a better subject around, given that their energy is focused somewhere towards the left. I'm not really into protest photos so it's hard to say.
Generally it seems that you need to develop a more consistent approach, which will take time and will necessarily involve improving your composition and eye for subject matter. You need to work on excluding stuff that doesn't matter, and giving your subject the attention it needs. Look at photos by other photographers that you like, keep shooting.