Aside from that already mentioned, it also looks like the horizon is tilted and you probably should have followed the rule of thirds as well.
More generically however I do have another comment. You commented that people don't go "wow" to this shot and I think part of that, aside from technical considerations is simply that there's -a lot- of shots like this around. I think that even if this shot was "technically perfect", you'd still get a rather bland response to it just because there's so many shots just like it in every photo and art gallery around. I have shots of Louisville Ky that, like yourself I really like, but at the risk of being blunt, it's just been done to death.
My advice here is that if you like it, keep it framed and hanging on your wall and just enjoy it yourself. You could probably re-shoot this again and follow all the advice here and have absolutely optimal conditions for shooting it...and still get a bland response from people who look at it.
Peace,
Jim
"It is horrifying that we have to fight our own government to save the environment. " - Ansel Adams
Walczak Photography - www.walczakphoto.izfree.com
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