It really doesn't matter to me if they are male or female from the operational aspect of the flight. Female eye candy is "always" nice....but an "experienced" FA on the receiving end of a sincere compliment about their service and/or the airline is more likely to really appreciate it and take a little extra special care in looking after you.
I always make a point to say something to them because I am in a front line job dealing with the public and I can empathize with what they must go thru day to day....or at least to some extent anyways.
[This message has been edited by Carioca Canuck (edited 02-13-2001).]