I had a person I knew take an online MBTI test, which came out as ISFJ. It gave enneagram information, and this person was highest in 1, but was also high in 4, 5, and 6.
I've never (knowingly) met an ISFJ before, so I don't know if this behavior is typical...
She says that her parents were mean to her all the time, and that when she got to college she did a lot of crazy things before realizing their values were important to her (although when asked, she admitted she didn't embrace all of those values, and had only accepted some of them.) She still acts nervous around her parents when they come around, even though they tend to be very nice to everyone (She claims they're just trying to make up for being so mean earlier in life).
She seems extremely introverted (even compared to me) despite being around people more often than I am, and looks like she's on the edge of going into absolute panic most of the time, as if she has more to do than she knows how to cope with. She likes to play puzzle games and solve "Nancy Drew" mystery games on the computer (both of which she's very good at) and look things up online at the end of the day. When I told her she was good at them, she dejectedly said, "That's one of my few talents." She seems to have very low self-esteem, which she admitted.
She works in an office, tends to keep a lot of paperwork organized very well and works with QuickBooks a lot.
One of the reasons it seems to me that she's stressed out as often as she is, is that when ever a new task comes up, she fusses over how every little part of it is to be done, rather than just doing it... so her Extraverted husband often ends up doing a lot of things instead, and actually enjoys being busy all the time, seeming to just breeze through tasks (He actually cooks most of the time.)
If she's asked to cook or what she wants to eat for dinner, she'll usually end up ordering pizza or getting Chinese. If she does cook, he usually criticizes it and tells her how he would have done so much better (which I think is why she doesn't like to cook.)
She had another really weird trait... reacting very strongly to things, frequently. There was an Astrophysicist from Germany at her house recently, and he didn't really know much about American culture. He happened to make a joke about a high-quality picture of her which zoomed in too far, and she thought was unflattering. So she got up, went around the table and slapped him on the shoulder, and then sat down. When I chimed in, "Everyone looks bad up close," she got up and hugged me.
She thinks recycling is important, and has everyone who comes over throw aluminum (or is it all metal?) into a blue recycle bin she keeps around as well as the trash, which is supposed to hold everything else.
So... is this about right?