Going through my shots taken over Xmas, I seem to have been obsessed with rocks and cliffs. I suppose there are worse things. Although I was just a bit surprised while going through the images at the high percent. I remember reading that you need to have a theme in your portfolio to be a successful photographer. My theme is obviously "Look; a squirrel" as I take pictures of any thing that catches my eye.
A few examples (about 100 of 122 shots I took over Xmas are in this vein)