I like the first one a lot, it's such a simple little shroom but it looks great.
The other two, the main subjects of each are out of focus and blurry... sorry. Plus the sand is overexposed in #2 and you cant see any detail.
Do you use photoshop to work with your photos? I've found that lowering the exposure on sand through use of a mask is GREAT because it is normally overexposed like that.