Honestly, I didn't mean to be negative. Two of my best friends and my grandmother are ESI.
They're all like that. Strict. That's why they're so good for ENTj's.
My grandmother and grandfather are ISFj-ENTj, and they're a lovely couple. They're very strict though and when I'm there I have to have a schedule and stay on it or it is extremely stressful for them. My mother [INTp] is the same way except to a slightly less degree.
I don't see being strict, judgmental or scheduled as particularly bad traits, in fact, they can be very good traits as my grandparents are very responsible and are millionaires probably greatly due to the way that they live; extremely organized, well thought out and scheduled.
And what I meant by the way the ISFj's tend to avoid negative topics is that if we get into a conversation that is slightly bearing towards negative, the ISFj will tend to sit down and have the mentality that I need to organize my negative thoughts and address them in a civilized manner or not address it at all. They also tend to plan their "sit-downs". It's kind of like, "oh, you want to tell me something about how you're feeling? Ok. How does seven work for you?"
Again, being organized and scheduled is not a negative trait. It's a trait that I actually greatly admire and yet do not have.
And also, I said that the whole age thing might not actually be a characteristic of the ISFj, I was just throwing that out there.