Hi James,
I think you may have been a victim of dull weather in general, the skies are rather flat and don't offer much contrast, colour or interest.
Number 1 is an interesting point of view of Bridgwater Place, however, there's a bit too much patchy dark tarmac and railings in the shot / the building itself looks like it needs a little straighten
2 Doesn't do much for me in terms of composition, I can see you were going for a reflection shot but I think the dullness of the sky and flatness of light kill it a bit.
3 Is a stronger image, good leading lines, however there's not much of an emphasis on a particular element in the photograph, could have perhaps been a little bit wider?
4 For me there's a bit too much undergrowth, I'd have taken the shot portrait and emphasised the reflections.
5 Princes Exchange is a stark and crisp building, its a shame you've cropped the corners out and I'm not sure the sign does anything for the shot whatsoever. I'd say get up close to the building and shoot up to skew the angles and emphasise the sharp points.
Like so (taken ages ago on crap out of date film)
Prince's Exchange by
jST., on Flickr
Hope the above doesn't sound too harsh, Leeds (like everywhere) looks much better on a Sunny day and gives you loads more to work with.
J.