I'm an ISTJ 9. ISTJ's are not known for being sensitive, but I have been labeled as a nice, diplomatic, and sensitive person by many people. My parents even thought I was going to be a veterinarian as a career because I loved animals so much when I was a kid.
Also being an ISTJ and a 9 I have had the hardest time of anyone I know dealing with my emotions, to the point where I almost became numb in an attempt to just get it to stop. However, I am not at all a dutiful or traditional ISTJ. I live at my own pace and do my own things and desire to be alone so much that at first I thought I was an E5.
In all, I can say it feels very strange to have an MBTI preference for Thinking and yet be a 9 and so focused on emotion and empathy.