I don't love this one for free study, as a macro it is good. But I just don't think it will hold up in a free study. The stem is too centered and the composition is off.
alright...I like this one the best...but I love close macro detail and this has it. Not sure if this was cropped or not but if you can bring that flower in the near center to the left of center it would draw my eye into the frame better. High Pass!!!