I think dilbert is close to saying the right thing, but saying it in the wrong way.
These are technically accomplished, but creatively sparse, you've nailed the magic hour technique, but with such an iconic landmark you really need a new angle to stand out. We've seen these before & we'll see them again.
I live on the west coast of Scotland and I am spoiled by some of the most beautiful coastal and mountain scenery in the world, and most of it fairly accessable. Which means that you'll have seen most of the landmarks, in HDR with ND110's at dusk, at dawn, with snow, etc time and time again.
There's nothing worse than seeing 1000x Colin Prior or Joe Cornish clones. Colin & Joe are masters. I'm not at their level, and neither are the dullards in scottish camera clubs who would be as well as working a photocopier than working a camera. I'll never attempt Black Rock for this reason. Folk have done it before, folk have done it better, folk more creative than me, or more willing to get the ropes out will get better angles than me.
Please don't be disheartened. They are nice images, striking colours, decent composition, capbale depth of field control, they display the ingredients you'll need to create striking brilliant images that folk will want to come back to again and again, just I don't think you've done that here.
You could submit these to a library and they would probably sell pretty well, if thats any consolation.
I sincerely look forward to seeing what else you come up with in the future, I and hope you take my comments in the spirit intended.
To those dilbert bashing, the place for sychophancy is flickr