It happens to new LDers as well as more experienced ones. Sometimes clarity and clear thinking are out the window, sometimes it is extrememly clear.

Overall, the quality of LDs improves as you gain more experience.

I would estimate that maybe 15-20% of my dreams are of the sort you are describing.

Kind of like:
"Hmm, see mountain"
"Fly to top of mountain"
"Hmm, 'nother mountain"
"Fly to top of mountain"

Almost subhuman thinking!

Keep practicing and give yourself verbal commands, that seems to work best for me!