First picss.

Heres some shots i took.

shot w/ rebel xti

sigma 10-20

Both shots have a bit of a tilt and would look better when straightened. This is obviously a very wide angle lens and less suitable for this sort of shots - especially the first one.
The colours are nice (how much post processing went into this...??? ) and the exposure is a bit on the dark side but interestingly moody.

The composition is certainly not abiding by the "rule of thirds". May be with a bit of shifting and cropping the shots can be made more interesting. Both shots got something but are not "finished"....in other words: there is potential but you haven't optimised it.