While some will disagree, I have been told many times over the years that the correct position for traditional drop bars is with the lowers parallel to the top tube. Nowadays with the ergo bars and sloped top tubes I set them with the lowers either parallel to the ground or a few degrees positive.

Some folks, especially those from a competition background will fit a bike with a performance fit, smallish frame, lots of drop from saddle to bars, some who are more casual or interested more in comfort will have a slightly larger frame and less drop. Then there is the "Hobo" fit or Rivandale fit where folks ride frames three size ranges too big and the bar top even to or higher than the saddle. Of course, some bikes are designed for and intended to have a high bar, like the old Stingray, lol.

As to saddle to bar drop, that is a function of frame size and an individual's fixed PBH, therefore their BB to seat crown measurement should always be the same for all bikes, the smaller the frame, the more seat post exposed and the higher the saddle will be in relation to the bar tops and etc. A strong rider on the drops with a good four inch drop will be in a position to deliver maximum power and efficiency and good aerodynamics. Some people raise the bars so high that when they are in the drops they are higher than with a "performance" fit when on the tops--lol--why.

Some people like their bars jacked way up, I always though it looked kind of hobo but not as bad as flipping them over backwards. On my "fast" bikes I like about four inches (or more) of drop and on my more relaxed bikes about two inches. These are my opinions, others will vary considerably.