Thanks for posting those portfolios with some very nice photos. I admire your willingness to post your self-critiques. Setting goals for the future is the best way to improve.
I think your landscape photos are best when they have a strong foreground element, such as Cnip 3, 9 and 10. When the weather does not provide you with interesting sky, then you must use a composition with a high horizon, which makes the foreground very important. Of course, it is always nice when the weather gives you something interesting such as Cnip 5 and then you can use a low horizon.
I would enjoy seeing more shots like the harbor scene in Ullapool 3 which is very colorful and has emotional appeal. (In that particular photo however I might crop slightly at the top to avoid the distraction of the houses in the distance.)