have you posted these before? i think i remember them
1. it's centered, the background is distracting, and maybe try getting more of an interesting angle, and maybe sprits the flower with water
2. out of focus, background is distracting angle is kinda boring
I agree. #1 needs to follow the ROT a little stricter. It also looks flat. Try adjusting the contrast a little bit, maybe some color burning or something to make it pop.
For #2, it's out of focus, yes, but what ruined it for me was the angle that the light is coming from. It's obviously outside in direct sunlight and that causes the hard, harsh shadows the flower pedals are casting onto itself.
I like the concept of #3, but there's no definitive subject. A prism can be a very interesting thing, though. Try a laser through it if you're wanting to photograph light effects.