Depending on what bikeshop you go to as well, they may have drop bars that vary from one another, some may have more drop, less drop etc. I'd say if they have different types to hold them and kinda position yourself like youre on your bike to get a feel for the bars, and also make sure that the width of the bar feels comfortable, it should be as wide as the distance from the center of your shoulders.

I wonder if the bikeshop I go to think I'm weird. When I'm eyeing a new pair of handlebars it takes days or weeks for me to decide. So often time I'll walk into the shop, they greet me, I greet them back, then walk to the back of the shop where they have the handle bars, I grab them and try to get a good feel for them on how they would be on the bike then walk out.