I like pics 1 and 3.
2 isn't saying me much. Maybe if you zoomed in more or did something experimental with it? (like a very low point of view).
1 and 3 can still be better tough..
some tips:
Putting the subject in the middle of a landscape makes the pic boring. If you cut away a bit on the side and a bit of the foreground it's better! (if you want to read more about it, have a look
here for example:
The third need is the opposite: it needs a bit more space. The boat is 'looking' to the right, but it has nowhere to look. The left side of the pic is absolutely
perfect!
But I have to say your pics are getting better!