Just a tip, see how you're horizon is right in the middle of the photos? Try either accenting the sky by having the horizon in the bottom third, or accent the ground by having the horizon in the top third.
Same thing with the sun, it's centered in all the photos. Put up in a corner for a more dramatic effect.
I'm not a huge fan of the HRD effects especially in photo 5, if you want a "HDR like" photo, buy a 2-3 stop graduated neutral density filter.
I think your best composition is in numbers 4 and 9, and I like the use of flare in 10. Just my opinion though, if you like them that's all that matters. Keep experimenting.