Signs of winter

As I wait for winter to produce enough snow to get excited about I have been trying to find something inspiring that would get me outdoors more frequently.
Until that time comes I have set myself a little project - to experiment with multiple exposure images capturing some of the signs I see along my hikes.

Here's a few attempts - not world beaters but I feel experimenting in such a way gives me a better feel for what might (or not) work with future subjects.

I have my own thoughts on these, would love to hear the viewpoint of others, eg;

- what aspects do you feel work/don't work for you?
- what ideas might you have for other suitable subjects?

Sincere feedback (whether positive OR highly critical) would be greatly appreciated as a learning tool.