What's your least favorite revolver? Why?

If it's all of a certain brand, tell us why you dislike them.
For a specific model, what makes it a non-starter for you?

I have to say I never liked Taurus anything.

The ones I've held or shot seemed to be inaccurate, have sharp edges, poor fit and finish, and those new grips were not to my liking at all.

That being said, I haven't touched one in a bunch of years, and I know a lot of people say they love them, but I just can't seem to like anything made in Brazil.

I haven't really got enough experience with shooting large numbers of revolvers to have a least favorite. However, I wouldn't carry anything for self defense that I didn't consider completely reliable. Since I have no desire to become a gun collector and am not an expert, in practice that means I would probably buy a new revolver only from Smith & Wesson or Ruger. I'd consider buying a used revolver from those, Dan Wesson, or Colt. Currently both of the revolvers that I own are Smith & Wesson -- my carry gun (an M60-10 .357 magnum) and my practice/plinking gun (an M317-4 .22 LR).

I'm sure that there are other excellent guns out there, but given my level of use and expertise, it isn't worth taking chances on companies that have poor reputations for quality control or customer service.