Thanks for the link/download to this track, really good listening. It's a very visual piece, conjures up all sorts of imagery, as all good ambient music should. The pad sounds are very contradictory in my mind, in a good way. There's a glassy/icy cold feeling to the pads in the mid to higher frequencies and yet a noteable warmth in the sound too, perhaps thanks to the subtle bass frequencies giving your ears a little hug:).
Perhaps you could develop the track even further with some extra layers, maybe some deep sub-bassy pad elements or some fx/field-recordings and some extra synth layers. Whilst the track definitely conveys your mood I still think there's scope for creating a more evolving piece. At the drop out in the middle section around 4:30 it would seem a perfect opportunity to bring the track back in with a big flourish of extra layers, sounds and development to take the end to a big crescendo, but then again, perhaps adding to much and busying up the track may be detremental to it's emotive nature, it's a hard one to call, but maybe worth trying out?