That was nice of him to let you use his lenses! What lenses were you using?
A few things about the first picture…
-It seems busy. The leaf that’s sticking up in the middle of the bottom of the picture is distracting, and I find the bright spots of light on parts of the flowers to be distracting as well. The flowers in the semi-background distract from the flowers that are being focused on, especially since they are the ones in the center of the picture.
-The entire branch on the right is not in focus. I think it would be better to either focus on a specific flower on the branch or else the entire branch, rather than having part of the branch in focus and then going out of focus on the end.
I like the second picture; I may have given a little more space at the bottom of the picture, as it feels a bit close to the edge.
I like the third picture too, but I think my favorite is the 2nd one. 🙂