First one:
Subject is in focus with nice separation from the background and your eye is immediately drawn to it. Maybe experiment with the crop a bit but overall this is a pretty darn good shot.
Second one:
Again, good focus on the bug, but the angle here just doesn't work. You've got a well focused black blob in a sea of green bokeh and it's just not enough to give it any interest. Coming down lower to an oblique angle might be a help here, but the bug is small so you don't have a lot to work with head on.
Third one:
Color and focus are both off. The sharpest point in the image is the center leg and the plant, and the rest is soft. Angle here is better than #2, but you need to approach this shot from the head side with that angle and get your depth of field flatter to get more of the bug in overall focus.
For me, the best one is #1.