I relate to a lot of what OrangeAppled said. A lot of people perceive me as easy-going. What I like about that is that I'm often told I have quite a calm atmosphere/aura about me, and I'm glad I put that across. However, I do have high levels of anxiety much of the time and sometimes I get extremely upset internally, though things have to be quite bad before it really comes out - at least with people who I'm not quite close to.
I guess I don't sweat a lot of the small stuff...I am genuinely easy-going in that I don't get too uptight about many things. For instance, if I'm with friends whose company I enjoy, I may be more than happy for them to pick what activity we're going to do together, etc. I'm not at all picky about food...all those sorts of things. But sometimes the "easy-going" is a bit of an illusion. I might be very upset about something but I feel vulnerable if I show too much of it to people I'm not sure I trust - and also, I don't like to upset other people, or feel like I'm being a nuisance, so for those reasons I may also keep a lot of it in.
Sometimes I wonder if life would be easier if I did more screaming and throwing of things. Just so I didn't internalize it all. I think you also get taken advantage of if you try to be easy-going, accommodating etc. I've certainly had that problem with people.