Thanks for all the input and impressions, it's interesting how there's several LSI-Ti and SLE opinions. For me LSI-Se is something that falls nicely in between those two and captures well the introverted analyzing part of Ti and the impulsive and reactionary Se. I didn't have any conscious agenda for how I should look like in those videos, the point was more trying to illustrate how expressionless I seem when not in the presence of Fe. The videos would look very different if I was talking to someone that puts out a plenty of Fe, then I become much more expressive, bantering and joking. When alone, I tend to fall into the unexpressive Ti analysis state.

A lot of my typing and analysis in general is some sort of combination of Ti+Ni/Se, usually I just arrive at an answer based on a gut feeling (integrated from Se impressions) which makes it hard to try to explain how I arrived at that conclusion. That makes me often uninterested in debating something in detail since there are no written references that I can point to, it's just imagery in my head that is hard to verbalize. I had a lot of issues with this when studying as well, since I'd just get an answer but it was difficult to write out in detail how I arrived at it. When writing my M.Sc. thesis I first wrote the whole background chapter from memory and then had to go hunting for matching references from books since it was required to do so. I found it boring and even distasteful to quote passages from books when I could've just written it from my own head using my own words.

And yeah, I would agree that I have way more problems with Fi than with Ne (I don't identify with extreme Ne-PoLR which seems to me more in the domain of LSI-Ti), but both are weak. I actually like Ne (especially Ne+Ti), but have a pretty strong distaste for Fi. In terms of dual-seeking, though, I think I prefer receiving Fe over Ni since I'm not as keen on replacing my own Ni insights (that aren't at the level of a Ni ego) with someone else's.