Great angle on #1! Especially since it's on its web. Looks like it's eating something too.
With #2, I find there isn't really a point of interest in the image. The top down view doesn't do much for the fly and much of it is off the frame as well, without any particular detail being singled out. The background is also pretty bland. I find the lighting pretty harsh and it causes much of the detail to be lost as well, especially on the top of the head.
I rather like #3 for its colours. Especially how the background darkens around the edges in many places. Like natural vignetting! It might have been nice if there was a bit more DoF so the second joints of the spider's front legs were in focus too.