I just simply refuse to leave feedback for a 
seller who hasn't left it for me.  9 times out 
of 10 I leave feedback for the bidders who buy 
from me... on the 1 in 10 I don't I blanked and 
forgot.  I also tell people if I haven't left it 
for them, to give send me an email reminder. ;)

It's one of my pet peeves for sellers not to 
leave feedback, when they're obviously waiting 
to see mine posted first. :P  *shrugs* those can 
wait til hell starts serving ice tea. ;)