Photto's Photography

The first one lacks direction. It doesn't seem like you're trying say anything with it - you're just showing a color contrast.

The second one is your best shot. The river and bridges provide a sense of place and move the viewer's eyes toward the focal point. I like it very much. Have you a high(er) resolution of it?

The bench shot is composed improperly methinks. You would want to convince the person to sit on the bench - by showing how quaint it looks - not show them what they would see from the bench. Perhaps you should have focused less on the sky. That's what I've taken from it anyway - my apologies if I'm mistaken ;_;
What I’m really trying to say is that it looks right, but it doesn’t feel right. I’m not sure if you get what I mean ;_;

The tumultuous clouds take away focus from the bright spot and somehow play with the viewer's focus - as if they were a cat and my eyes were a string. Very playful, but the bright spot gives it a sense of doom, foreboding and my eyes unwillingly gravitate toward it. I like it.

The smoking sign is too direct. It's almost IN YOUR FACE. I don't like it, but it's just a personal preference. It would work well if you had an agenda to go along with it - similar pictures, a cynical manifesto etc ...

The black and white bridge holds a lot of promise, but it feels like it's composed improperly. The pathway and the railings focus my eyes toward a spot, and then the buildings beyond it abruptly destroy the focus and dilute it with jagged edges. It would work cool if there was something at the end of the bridge – to take away the focus and the buildings behind would just be static background – not the focus.

The three flowers, while beautiful and well done, offer nothing new and I'm a cynical bastard so I'll say I don't like them

The last one is great, but I think your intent was to show how the cute little flower can survive and persist beside that slab of cement and dead leaves. But because the stone is so out of focus, it seems like it’s closer than it really is. It’s as if something is holding the angular slab and is about to drop it and flatten the poor flower ;_;
It's beautifully composed though - I love the contrast of the dead leaves and white gravel around it. Just the focus on the cement slab is off.

Protip: post HIGH resolution PNG pictures so that we can all steal them and be happy

Jam it back in, in the dark.