Yes. Good point. I would like to learn more about them, but I find it more difficult to find resources on these Churches than the EO or RC Churches.
The Assyrian Church of the East is the most difficult to find information on in English because of its size and general isolation from the rest of Christianity for so long. The Oriental Non-Chalcedonians almost always tend to get either forgotten or confused with the Eastern Orthodox, and are usually misunderstood even among many Eastern Orthodox. I have yet to come across any single volume which offers a good introduction to those churches which reflects their own theological positions and nuances. And honestly it seems that most Oriental Non-Chalcedonians don't have too much interest in distinguishing themselves from the Eastern Orthodox. Most of them consider us basically the same, which I think is probably a bit lazy.
But if it's not important for most of them and if they think that our churches are the same, then because of that I really didn't feel any pressing need to examine those churches before settling with the Eastern Orthodox. If they were really the True Church, then they would speak of themselves that way, and in my experience they really didn't. Add to that more practical things like the lack of presence internationally and an even further culturally removed situation than we find with Eastern Orthodoxy, and I just didn't have too many reasons to look into their claims or anything. Maybe I will at some point. I did attend a Coptic liturgy in my city once during my period of inquiry, but that was it. They were all really nice, wonderful people and were very warm and welcoming. But it was just too foreign compared to the all English Eastern Orthodox parish I had been inquiring at.
The Assyrian Church of the East doesn't even have a presence in my city or state, and again there were no real resources, but also the practical fact that Eastern Orthodoxy and the Oriental Non-Chalcedonian churches do not have warm theological relations with the Nestorians led me to never give them too much consideration. These days I really get the impression that they probably are heretics, despite their cries to the contrary.
So in the end the choice for me remained between Roman Catholicism and Eastern Orthodoxy, but I was just pointing out that there are actually many other possibilities at least hypothetically, and it will be up to you to come to your own conclusions about those possibilities. In the end, I chose "Eastern" Orthodox Catholicism rather than reverting back to my cradle Roman Catholicism. (I was a Protestant during my adolescence and into young adulthood.)