The fact that 2 of your loves both tested as ISFJ does not mean much, as that is the most common personality type of all for females.
Other similarities can be explained by them both being "your type" (meaning having qualities that attract you, not the same MBTI classification), but it is certainly possible for "your type" to be influenced or refined by qualities of those whom you loves or who fit "your type in the past.
When I took psychology in high school I was told that we look for lovers who are much like our mothers(or fathers)
In my college psychology class I was told that that theory is wrong, at least for the most part. Instead it is thought that we look for someone who fits our subconscious model of what a member of the preferred sex should be like. This model is mostly built in early childhood, but it can be modified somewhat at any age. It is not based on a single character, but an amalgamation of the members of the other sex whom one knows. If a heterosexual boy's
only early female influence (including those seen in movies/TV, whether real life or cartoons, or described in stories he is told) was his mother, then your idea would be essentially correct. However, sisters, aunts, grandparents, and friends of the family also frequently play a large role in shaping this model.
(Another theory is that we are simply most attracted to the opposite sex version of ourselves, and the resemblance to relatives is just a coincidence. It is the case that most people find photographs of themselves very attractive after that have been digitally altered to appear to be of the opposite sex.)
I remember when I was 4 or 5 years old thinking about what my future wife should be like. This was right after watching Beauty and the Beast. I remember going to the dining room to play with some candle stands and thinking how wrong it was for the man to have blue eyes and the girl brown eyes. I remember picturing the ideal woman as having blue eyes and long hair like my sister, but the somewhat darker hair color and face shape like my mother had. (I did not think of it then, but my preference for INFJs could be seen as an an amalgamation of my INFP mom and ISFJ sister. Ignoring type though, her personality and interests were just more like mine than almost anyone else I knew.) I pictured a body type more average than either of them. (I guess this could have been an amalgamation of my mom and sister too, as my sister was quite thin at age 9, as opposed to fatter than mom as she has now been for quite some time.)
After I first fell in love I modified my ideal by making her skin fairer (not that it was very dark to begin with) and making her taller, like my beloved. The first girl I started to fall for after I finally expressed my feelings for my first love and was rejected actually fit my early model better, before those modifications. This almost-girlfriend was slightly more olive skinned, and the same height as my mom and sister instead of only a couple inches shorter than me. (I wasn't really ready to move yet though, and was not really sure if I wanted her more as a girlfriend or close friend. I tried to make contact with her too late, and she never responded. It seems that right before my first message, slightly more than 2 months after I last saw her 5 years ago yesterday, she met the man she married 2 years ago and with whom she had a son last February.)
Since then the girls I'm attracted to usually seem to either fit my first-love or almost-first-girlfriend mold, to varying degrees. Recently I've been most interested in 2 girls who strongly fit each mold, despite them both being Korean and not blue eyed. I've known the almost-first-girlfriend-mold girl a little longer, find her more physically attractive, have had much more meaningful conversations with her, and suspect that she likes me more. The first-love-mold girl has seemed to have a much greater effect on my emotions though, and it is much easier to imagine being romantic with her. After getting back in touch with and building a friendship with my actual first love recently though, I've begun to notice more personality similarities between her and the almost-first-girlfriend-mold girl. After meeting my first love in person again and finding I now love her only like a sister I found that my feelings for the girl of her mold seemed to disappear, making me think I may have just been transferring them to begin with. Its just as well, as it has been quite some time since I've seen any sign that she might be at all interested in me. I was rather depressed at the end of the semester when she was ignoring me, but I think I'm over her now. I did not know quite as much about the almost-girlfriend and never idolized her like my first love, so I think there is much less pressure on a relationship with the girl of her model and that a healthier, more honest, low pressure relationship. I'm thinking of asking her out soon, but I'll probably wait until I move back to school and have a bit more independence first rather than while I'm unemployed and living at home without my own car.
