Sketches in paint 2

These sketches are all based on the same scene, along the coast just outside the village of Claddaghduff, which is about seven or eight miles from Clifden.
In the vein of loose painting, I completed them very quickly (if they can be called complete). One is on a colored paper and the other two are on a heavy acrylic paper.

I enjoy working on a colored ground or paper and it is not quite the same thing as paper that I have colored myself, although I probably need to work on this. Psychologically, one feels more free straight away and I think this usually shows. It has something to do with the daunting hold a blank white sheet of paper has on the mind - it scares us a little. This really should not be the case for someone like myself who has been putting paint on paper since childhood but I do think that it is so.
The other point about these colored papers is that they are very light and not really designed for heavy applications of paint. They tend to buckle especially if larger in size than about A5. This does not bother me especially but may be off putting for a potential buyer/owner of the piece. What is your opinion?