Zildjian cymbals are not any more prone to breaking than other manufacturers'. Whether they sound good to you is another story. :) It's hard to make that judgment about a product line so big and varied anyway.

These days I'm playing Sabians, mostly AAX. Not out of brand loyalty, just cause they all sound pretty good for what I do (loud, fast rock). But I've had a handful of Zildjians that I really enjoyed (wish I still had the 24" A Ping Ride that I broke in high school), some Paistes, a Meinl here, a Byzance there...