Like people, plants convey a sense of gesture. For instance, these dogwood blossoms looked to me as if they were "dancing" in the wind. So I moved in close with a macro lens to fill the frame with petals facing different directions--but not so close as to crop out that sense of direction or movement. Giving them a little breathing space or "face room" was important as well.
Photo ©2007 Lee Anne White. All rights reserved. Cornus florida 'Decker' photographed at Yew Dell Gardens, Kentucky.