Because Japanese culture has been a part of my entire life and I'm interested in learning more about it, which includes currently learning Japanese, I understand a few words. However, if I didn't know what "nii-san" meant, I'm be really annoyed at FMA: Brotherhood and Bleach for always putting that in the English translations. I can't tell you how long I went not having a clue what "gambatte" meant.
I realize fansubbers do an awesome job of quickly and usually acturately translating series, etc. so average people can watch them. I appreciate them for that.
