Love the DoF on number 3. However the line going diagonally bottom-right to top left in the bokeh/OOF background is a little distracting... once I've seen it, I can't keep from looking at it. Clone it out?
#2 I would do a tighter crop around the head of the snake, but the main bit (tongue) is sharp!
Less sure about #1 - hard to gain any context, it's not abstract enough, nor is it clear what it is (to someone looking at just that image!)?
Feel like ive been really critical there, I like them, honestly...