INFJ and ISFP Relationship

Hello @Defective. I felt like responding. I have never dated an ISFP and don't really know any ISFP females (I suspect one of my four sisters to be one though - either ISFP or ISTP imo). I have had a good friend as an ISFP and here's my take on the experience of interacting with them:

• Overall, I really like them. They seem very low-key overall. Truly introverted. But they are quick when it comes to getting involved in the action of something.
• I think as an INFJ, I have a "shadow" preference for wishing I could manuver in the world like an ISFP. ISFPs have a very easy time with Extraverted Sensing. They take it as it comes. They don't get worried, too excited, or too dismissive when it comes to extraverted sensation.
• I have not tried to impact an ISFP in any way(watching them "grow" for instance, per your example); so I don't seem to share the same frustrations there. From my experience, there has been virtually no conflict at all. I've mostly seen ISFPs, in real life/not online, as mostly laid back and easy-going in their presentation. They are surprisingly good at listening and understanding things, even beyond their natural understanding level(it's that tertiary Ni).
• I just let ISFPs be themselves, do their thing, and they've always mostly been kind to me. It only sucks if there are any serious decisions that need to be made, INFJ can feel like the ISFP doesn't care. They just do their thing, and you are expected to "let them be".

Just my two cents.