well, for me, the fact that the members here are geographically separated and aliasd are the reasons why i can open up here, noone knows who i am, where i live, what i look like...
also, it is a group of like-minded people (literally), so they understand what i am trying to say, i dont have to explain what a sensory overload is every single time (for example)
lastly, as said a few times before, becouse i'm typing, i have all the time i need to formulate my thoughts the way i ment to say them, and i can go back and edit if i so wish, try that in real life...