Just my opinions...
First set #1: Good DOF choice, very good focus centering (on eyes). Color scheme works well - neutral fly on brilliant green and that eye is perfect.
First set #2: Very good eye for composition, great background bokeh, terrific color scheme. However, brightness is too high (This is corrected with Second Set #1 along with a color shift).
First set #3 & #5: Lighting hurt this one. Maybe one of those little 12" diffuser disc would help? Missed a bit on focus (or motion blur)
2nd set #1: Repeat from first set: I was going to question the color fedelity of previous version of this one - here it looks like the brightness and color got corrected, however, I like the color of the first one!
2nd set #2: Good composition, circles of confusion work well with the straight lines of the twig. Lighting may have hurt this one too. The red at the bottom of twig is point of interest but too small - would have maybe gotten closer to that. Some of the chroma around the water drops seem strange.
2nd set #3:Good background, maybe a little too bright(?). Face of bug in shadowy area compared to rest of image.
2nd set #4: Lighting killed this one, but bug wasn't in good position anyway so not much loss.
2nd set #5: Background is perfect - get rid of the bug and you have a nice shot here!
At 15 you are doing better than me! Keep it up. The only pointer I might give is to take care with exposure time. Outdoor work in direct sunlight can be maddening and going after things that move make it even harder, but keep an eye on the meter, bracket if you have time and also look into carring a small diffuser disc to help with direct sunlight contrasting.
Spider! I forgot about the spider. I think this is what we used to call "garden spiders", harmless critters and pretty. Their backs have the neat pattern but to my eye the back-end of a bug doesn't work. Best to find a different angle and focus point for this one?