Being new to wheel guns, I've only had 4 pass through my hands:
Ruger GP100, Ruger SP101, S&W 629-1, S&W 36.

Just two brands, so I can't speak from any kind of real experience. But, the triggers on the Smiths are amazing, and in single-action, the trigger pull's maybe .5 grams? I'm kidding of course, but I've never felt a lighter S/A trigger than on either of the Smiths.

Now, having said that, other than at the range, I don't think I'd ever consider cocking either of the S&W revolvers. The triggers are so light, it would (especially under stress) seem to be a disaster waiting to happen.

Though I'm not sure about the model 36, I'm almost certain that the 629-1 hasn't had any trigger work done on it, as owners of non-tweaked 629's seem to agree (re: super light trigger in S/A).

So, is this just a S&W thing, or are there other revolvers with equally nice triggers? I'm assuming there are, but the two Rugers I've had certainly aren't examples.