Speaking as a reader (and I spend more time reading than writing), I think I have a high tolerance for angst, but that doesn't mean that I necessarily like it or care to read it. What I don't like is depictions of violence, cruelty, psychosis, etc. That those things exist in the real world is all the more reason why I don't find them entertaining to read about. I also don't like angst that seems artificial--that comes from problems for which there is an obvious solution, or that is overstated for the situation. Angst based on characters behaving childishly, histrionically and stupidly. I don't like it when characters seem to wallow in their own misery--like when Darcy turns into a drunken hermit after Elizabeth's rejection. I don't find that moving, I find it irritating.
I think angst needs to have a purpose, not just be heaped on for the sake of making the characters suffer. Like Jaimy, I don't need a romantic HEA, and I'm fine with alternate pairings if they're well done, but I want to feel that there is some resolution at the end (other than a Hamlet-style "there's no one left to die" resolution). I don't have much taste for tragedy, unless it's a really interesting one, and prefer a hopeful ending, at least. And I want to like and admire and sympathize with the characters who are going through these trials. They don't need to be perfect or not make bad mistakes, but they should be understandable mistakes, so that I care about what happens to them and really feel their suffering is not entirely something they brought on themselves.
I think angst needs to have a purpose, not just be heaped on for the sake of making the characters suffer. Like Jaimy, I don't need a romantic HEA, and I'm fine with alternate pairings if they're well done, but I want to feel that there is some resolution at the end (other than a Hamlet-style "there's no one left to die" resolution). I don't have much taste for tragedy, unless it's a really interesting one, and prefer a hopeful ending, at least. And I want to like and admire and sympathize with the characters who are going through these trials. They don't need to be perfect or not make bad mistakes, but they should be understandable mistakes, so that I care about what happens to them and really feel their suffering is not entirely something they brought on themselves.