These came out pretty well considering the lighting, but very noisy. For night photography you should be using a tripod, which will allow you to lower the shutter speed and use a lower ISO, which will significantly reduce noise.
2. I'd skip shots like this, just some tags on a wall.
3. This one is quite crooked. Square it off and it'll be fine.
4. Maybe angle it down a little more so the street is more in view, which might create satisfying lines from the bottom to the center of the image.
5. Again, square it off.
But the biggest thing is, USE A TRIPOD. 4, 5, 6, and 8 would be much better with less noise.
#8 is actually really cool, I like the ominous look to it. I'm curious to what you're using to take the pictures though; cell phone, or DSLR? If it's a cell phone, I have nothing to say because I know nothing about them and never use mine. If it's a DSLR, like DescentOnARope said, DEFINITELY use a tripod and a slower shutter/lower ISO. Square up the shots, and check your framing because #7 could be an awesome shot if you're further back, a little to the right, and clear. The idea in #4 is really good, but if it were me, I'd have angled it down like DescentOnARope said, but I'd have also tried getting the shot from the middle of the alley with the tower in the right frame. I love night shots though. Plus, I'm sure it's colder than cold in your area, so I could very well see why I'd not even be outside. #3 would be awesome if it's squared off, and shot with a tripod, slower shutter, and smaller aperture. That way you'd catch the glows of the street light's colors on the walls better. #2 looks like you accidentally took it. It can go. And #1 would also be a badass shot with a tripod, and all the same junk I said on #3. Keep it up. ASSUMING it's a DSLR, just go shoot. ON MANUAL. Once you really get into that, you'll never touch "Auto" or "night shot mode" again, trust me.
I'd say square it off and make sure the images are straight and if you're using a DSLR control the ISO and lower that to get less grain. Make the aperture as wide as possible because it is dark. Also get a tripod to make the long exposure shots possible with low ISO. Overall amazing location, I'd like to check it out one day.