I tried a bike with moustache bars and brifters on Saturday. Yuck. I was going to switch my Alfine bike from straight bars to moustache but the LBS saved me $50 with the test drive.

I settled in compact drop FSA Omega handlebars instead.

If I was going to switch to a bar shape other than drop -- it would be butterfly bars, which I have on my Bridgestone MB-5 winter bikes. More hand positions and much closer to an aero concept on the inner top position.