It looks like you are missing your focus with the panorama (and obviously the fence one, but maybe that one was intentional?). When taking night time pictures it's best to focus manually. When objects are at a distance, focus to inifinity on your lens. Be sure to check to see what inifinity on your lens is before your shoot- not all lenses are properly marked.
Also watch your horizons. The panorama is tilted ever so slightly clockwise. The fence one very much more so.
Back to your fence thing... it's great to have other objects in your foreground in these shots. It lends some interest, but in my opinion you have to be careful not to make the object in the foreground the primary subject. In this case, your fence is in focus and your skyline is not, so it makes the skyline very much secondary, which is probably not what you want.
There is also a natural tendency to want to underexpose night time shots to make everything look dark, because it's dark out... right?

Anyway, you want to err a bit on the side of overexposiing the shot so that you can see the details of the buildings more. Otherwise they become black masses that blend in with the night sky behind, with the exception of these little dots of light on them. I think you got it pretty near to perfect on #2 (I might have exposed it a hair more, but not much- the NEW YORKER just looks so perfect as it is and I wouldn't want to lose that). The panorama is a bit dark. The fence one is tough because I'd like to see th ebuildings on the left exposed more but there are two buildings on the right that are already WAY overexposed as it is, and I'd hate to push them further.
BTW, I HIGHLY recommend shooting in RAW... this allows you to deliberately overexpose by a couple of stops and then back it down a bit in post processing. It guarantees those details will be there for you. It also helps you deal with the variety of color temperatures, vs. letting the camera try to figure it out (or hassling with it when in the field).
Whatever the case, these are a great start. Night time shots are tricky and you've already accomplished a lot of good stuff with what you have and you have a WONDERFUL subject to work with. Keep at it!