Some of them are pretty close to being architectural abstracts. Try moving in closer to isolate some elements and cleaner lines. This is only a guide for myself, try to include more than 3 or 4 elements in an abstract composition. Also try to look for some contrasting shapes within a frame, e.g. the reflection of the round part of the building vs the straight lines of the glass panels that's reflecting it. The last shot, probably go for the shadow and texture of the furniture..... again, go close.