In reply to MikeR:
First of all, good effort for getting out there while most of us were cosily tucked indoors. A shame about the unseasonal lack of snow. More snow would probably have helped technically too.
It is worth looking at others and working out what sets apart the ones you think are 'really good' (subject, composition, technical aspects, etc.). Some comments may be more subjective too ranging between the faithful reproduction of 'it's very dark' to a more 'arty interpretation'.
For me there is too much star movement for me, or at least, the blurry stars dominate the images.
The rest of the image doesn't look too sharp - that may be camera shake or it could just lack of detail or anything to draw my eye. I'm not sure a gorillapod is stable enough. Did you also lock the mirror up first to reduce vibration?
From your position you're looking upwards at the terrain and without much ambient or reflected light, you don't get much detail, and probably not much moonlight to help either (about 1/3-moon on Sat I think).
Looking at James' Rifugio Locatelli & Tre Cime photo - he has similar blurriness to the stars, but there is much more visual interest - both in the sky and on the ground.
You may have had the camera perfectly level, but it looks to me as if it's tilted slightly to the right - the top of Carn Etchachan doesn't look to be directly above it's reflection in the loch. Apart from technical bits, the main aspect for me is the subject/composition - although a nice place to be, it probably suffers from not being too visually interesting - maybe a different vantage point would have worked better (perhaps from higher vantage point, looking into the basin).
In the Diagonal Gully picture the stars have an odd blue cast to them.