It depends with the matter at hand. At times I might decide to remain silent if the matter doesn't hurt me so much. Also, I might remain silent because I don't want to be involved in issues. You might say something small and it might land you somewhere you never expected. But then, whenever the matter hurys e and cannot be comfortable, I tend to air out my thoughts so that I'll be at peace. The only problem with me when I air out my thoughts, am very short tempered and might end up starting an argument which will never end.
Over the past six months, I have had very hard time with the roommates I was staying because of very petty issue. I opted to remain silent for all those months and where I am at the moment, at I can say have changed. I now know how to live with people around me.