There's some nice ones in this sequence, but I'm unclear about what holds the overall group together without some explanation. You might get more helpful feedback with some narrative, or by submitting a single image you're particularly interested in hearing about. Here's my take:
1 - Probably my favorite because I like a mix of old rusty stuff and nature co-existing with it. I would clone out the little piece of trash upper right, unless I was using it as part of a trash awareness campaign.
2 - Nice sunstar! Makes an average cityscape into something special!
3 - Interesting reflection. Lots of cool geometry and subtle color. Lots of opportunity for abstracts here. Love the wiggly reflections in the lower third.
4 - Really nice architectural image with great framing. The cotton-ball sky helps make it. Another of my favorites in this grouping.
5 - Weird but interesting art object, maybe on the ground or on the side of a building. Calls out for more information!
6 - Pleasing city scape with the bonus of water and some reflection.
7 - Nice architectural image, isolated and simple with good afternoon light.
8, 9, 10 - All the same scene, but I prefer the latter one (my 3rd favorite) with the harbor light in the shaft of the reflection, and the birds of course.
11 - Pleasing evening image, with sunset colors and a really cool sun reflection. I wish for a bit more water space at the bottom and less sky at the top.
12 - Less interesting than the other architectural images, probably because the light has diminished everywhere except the glass on the building to the left. If presented as part of a "disappearing sun" sequence, it has more clout, but without clear context, it becomes a well taken image that's less interesting than the others in the set.