Since I spend the majority of time on the drops, I set the angle of the final straight section of the drops for maximum comfort. Like others have indicated, I position the brake levers for accessibility from both the hoods and the drops. The top of my stem is typically about 4" below the top of my saddle.

Anyone who doesn't position their bars exactly the same as mine is obviously deformed! j/k
Seriously, looking at other peoples setups, aesthetically I think as long as the initial forward throw of the bars is horizontal or downward, and the final straight (rearward) part of the drops is also horizontal or or downward, my sense of aesthetics is not violated. The brake levers can anywhere that puts them roughly parallel to the curved section of the drops.

Why? Are there anatomic bars too? Anatomy hasn't changed much with the recent decades as far as I can tell.

(Aw, heck, I didn't bring it up in the first place!)

I am reluctant to say it, and I'm not trying to say anything likely to start a war, but I've been very surprised to see the saddle and bar settings of many bikes I see pictured on the forum. If the saddle isn't even close to level, and tilts down at the front, the rider will slide forward; the handlebars on those bikes are often angled upwards, perhaps to try and compensate.

my currently most comfy set-up:



more drop relative to saddle, but compensated by pointing bar ends towards rear axle. frame is slightly too small, so I use it mostly when there's hammer fest on the program:

look no further than "the man" for the answer:

I think it's more goodlocking to have the endplugs pointing horizontal! More ethtetic i think Even though it's not that comfy...

Here's how my Fuji Tiara WAS setup:



I say was because I switched to a different NOS Sakae Modolo bar that was barely 1cm wider, had a tad more reach and drop, and (the reason for my change) had cable grooves.

I SIMPLY HATE IT!

You look at the two bars and they're SO danged similar....the differences are visually tiny but I could feel the difference the mile of the first ride. So, I'm switching them back.

I was mentioning how comfortable I felt on the old (soon to be back) bars with RobbieTunes a while back. As compared to my modern bike I get 5 different and distinct positions that really DO feel different and get my back into a slightly different position:



The above worked out for me (and fortunately I still have the bars mounted to the stem so I'll have the angle to transfer) and I think the angle and drop of the bars looks visually pleasing too, at least to my eye.