My experiences are with a various straightish bars, SR road/world champion drops, nitto noodle drops (sold), rb018 bulls, and rb009 pursuits.

My first good bike is too small for me and the rb018's are my favorite on that one, drops and pursuits are aweful and straights are o.k.
My fitted bike lets me have the stem nearly within an inch of level with the saddle and with a normal ~100mm stem, the world champs + cane creek aero levers is my favorite, the rb009 is ok on a 60mm stem and is both more useful and ugly than any of the other bars I have hanging around.

I'm hanging on to the rb009 with the hope that I'll get to enter some races over the next few years to put them to use, but they're just sitting in a box till I have time and fitness for that.