testing technique for flower shots

I don't shoot much flowers, so a few days ago when the sun was decently diffuse I took the T1i with the 70-200 f2.8 L and snapped a few shots.
Handheld, actually standing on lower rail of our split rail fence for all the Tiger Lily shoots since they are so tall. Captured in RAW, basic PP in Aperture 3, export to Picasa web for sharing.

Trying to learn what works and what does not for flowers, and share w/others.
C & C plus advice from experienced "flower shooting" photogs appreciated

I believe these are all at f2.8 for shallow DOF, the first shot was before I remembered the water bottle mist/drop technique, all others were misted for the drop effect.

#1: focused on the center portion (no water mist obviously)


#2: w/o flash


#3: same basic shot just w/ pop up flash, I like how this brought out the center stalk


#4: I posted this in pict of the day 2 days ago, this w/o flash.
Focus on center portion


#5: same as#4 but with pop up flash; the front flash seems to have washed out some contrast.
Makes me wonder what side or back flash could produce.


#6 focus was NOT on the center but one of the pedals itself.
Lesson learned>Focus on the center, its what attracts the eye
No flash


#7 same as #6 but w/ pop up flash


#8 - same as #7 but focus is on center



My lessons learned and sharing with others:
a) diffuse lighting seemed good for flower shots with pedals open to the sky
b) the front flash helped on the "stalk" type flower, but seemed to diminish contrast/blacks in the open flowers
c) focus on the center parts; stigma, anther, filament, and let the other parts that come into focus be what they will.
If more portion of the flower is desired sharp use tighter aperture than f2.8
(or bracket the shot for aperture)
d) no breeze is an almost must for crisp/detail
e) eye level/near horizontal shots seem more interesting

Future:
f) experiment with side/back lighting and see those effects