[Dabhand16]

You have certainly tried a variety of things here Mouldy.

#1 I think the exposure is good, amd I like the plain background, but I'm not sure about the angle you have used with the flower. I've been craning my neck to see if a 90 degree rotate cw would improve it. I say this because then the leaf would be under the flower, at the moment it is competing too much for my attention. Also the flower would then be pointing left to right, a more natural diretion as it is the same way we read and write - so the flow L > R is more natural.
#2 This works for me and is the one I like best. Not too sure why, maybe the contrast between the out of focus LHS and the delicate detail in the other.
#3 I like this one better than #5. The stamen are nicely lit and the petals are both soft and detailed.
#4 Great detail on the flower, AND it's pointing the right way, but I don't like the mottled backround (maybe some free transform to the background give the illusion of clouds would be better?) or the leaf being both very close to the flower, and is above the flower, so tends to take precedence.
#5 I can see what you are doing, but the shot does not do it for me. Maybe if it were all in focus, maybe if there was more light on the stamen, but I'm not sure. I think that the petals are too tight, and give you only this angle to see the stamen.

I'm sure you are pleased with these shots. Technically good, for me the devil is in the detail! I think it is far more difficult to take a single flower than a bunch or an arrangement.