I too am unimpressed by the photos; given the subject matter, it ought to be easy to make good photos, although some of the problem, the muddy skies for example, might lie in inexpert scanning.

As for the tilt, buildings with tall towers, to one side especially, are very difficult to take, since they tend to lean in thru perspective; but the systematic tilt here, assuming it's not a scanning problem of some kind, well . . . I discovered, or rather, a doctor friend of mine pointed out to me instantly, where my own tilt (the last few years, about 0.8° to the right) came from: I tend to stand with my left foot slightly forward. I've been working on correcting it; in the meanwhile, though, I've corrected I dunno how many hundreds of photos in PhotoShop, tilting them back again!