While I believe I have grown a tougher skin over these past few years, the memories of my teachers, instructors, and other people telling me to "let it roll off my back" still haunt me. I'm always waiting when someone gives critique, what they are going to say.
To be honest though, I'd rather get critique in the real world, seeing the person face to face, because I read their motions much better and to be honest, people behave much more better in real life then online. I can't read a person's emotions online, even with smilies, because they might be sarcastic too.
I communicate better online, but I don't usually trust people for critique online. They are very miscellaneous and they are often very rude with their critique.
And I'll be honest, that's why I'm not on wrong planet very much, I find people here can get really rude with their critique. Granted, they are on the spectrum too, but yeah...I have to be in the mood to hear critique from them.
I think sensitivity has it's good parts, such as being sensitive to someone's feelings and sensitive to some noises or tastes that actually AREN'T good at all. Then there is also being sensitive (if you believe in this) to other worldly things, you can have a sixth sense basically.