I run at the other end of the spectrum. My stress is very much internalised and it takes a lot of it to pull me down. In some ways this is worse because by the time stress starts to manifest outwardly in me, I am quite literally at breaking point. I take a lot of crap but it's as if I use it as a form of self flagellation, I never seem to give myself a break.
It means I will let people waste huge chunks of my life before I fight back. I'm just too nice. And I'm sorry to say I have wasted a lot of my life on people who just didn't matter in the long run.
I have a different attitude these days. Whilst there are some things that are continual nagging stress problems and never seem to be sufficiently resolved - financial, living environment, work concerns (most of society right?), there are many things I now deal with far more easily than I used to.
If people stress me out, I walk away. My ability to drop people who complicate my life may seem callous but believe me, it's a lifetime of experience that's got me to that point. What it means is that the people who are in my life are generally hassle free and the relationships are far more meaningful. I may have a small friend circle but it is refined and keeps the stress levels in check.