John,
I love the contrasting colours and the blue hour in the first, very nice!
The second is a good image as well, the people mingling around the forecourt with the Marriott sign above make for the basis of a good Architectural advertising shot you just need to do some thing about those lamp posts/street lights. Get down there with the right lens and a tripod and you will have a cracker shot I reckon.
I am interested to hear why you think some elements of the building are not straight and what those are.