Originally posted by Dom Now that's how HDRi should look. My only minor comment is the lens flair, I'm not sure it works.
Ooh, I'm hoping you're flattering the OP!
Although I'm happy that the tonal mapping on these photos isn't manipulated to the extent that the tones are all of the same value, I am disappointed in this HDR. The images, especially the first few, have large sections of blown sky! I notice that the OP has tried to combat this by simply mapping the tones to something below blown, but this has no impact on the utter loss of detail and colour information, it actually makes it look worst.
I'm not certain how many exposures were taken per given image, but I suspect it may be one exposure. If that is the case, this is not HDR. If the OP has taken more than one image, then my suggestion is to make add additional exposures that capture the highlight details of the scene. For sunsets and portions of the sky, this usually involves very high shutter speeds.
You've got the right idea going with your not-over-the-top tonal values and scene contrast, but the lack of highlight details makes this HDR lack that extra punch.
Additionally, I've just noticed that there are many dust specks on your images. Visible dust specs suggest you are using small apertures. I'm not certain why you would do this. The best way to take HDR shots, or anything involving multiple exposures, is to pick an aperture setting, say f5.6 or f8.0 (but these are completely scene dependent), and vary the shutter speed to compensate for the different exposures. Varying the iris will create odd effects involving dust, depth of field, and contrast.