I agree, this "flux of events" could be either Si or Ni cognition. I think it can be said, though, that you are definitely a Dynamic. I think the difference between how the two perceive the flux of events is that Si is more reminiscent, while Ni is prescient. Si is about storing and reflecting on previous sensations; Ni is the photo negative of the will, and is therefore about trying to predict actions before they happen. I think once you figure out if your orientation is towards the future or the past, you'll have your answer. (With your predispositions towards religion, I have my suspicions.)
An inability to muster up the will to do something sounds more Ni than Si, too.
I think the reason why you mistook yourself for ILE might be related to the fact that socionics is a system built around the worldview of an ILE. A guy called the Ex-Socionist once posited that ILE is the integral type of socionics. Like Schopenhauer's idea that outside ideas make an imposition of a consciousness, to be in the world of socionics (or any alien system of thought, for that matter) you have to encumber yourself with a different set of cognitions. When we do socionics, we all become more ILE. I had a similar problem. When I first found socionics, I was certain I was the spitting image of ILI. As I got more entrenched in the system, I started to mistake myself for ILE. Now I'm back to ILI again.
Still, I think Ni types are particularly attracted to analytical psychology because it is founded on the work of Jung, an Ni type. That's why there are so many IEIs on here. I think a lot of Si/Ne types might get easily bored with it because there are myriad of other objective intuitions that are equally possible (20 types, 30 types, etc.) I think it is especially attractive to Gamma NTs, despite their reservations about its Ti reasoning and lack of Te substantiation, because it provides a holistic map of how to interpret people. Newton (ILI) once said, "I can calculate the motions of the heavenly bodies, but not the madness of people." Socionics has that so-called hidden knowledge. I think Delta STs are more likely to say "it is what it", taking a very literal, sensoric view of Te, and not penetrating the issue much further. My grandfather is an SLI, I think, and for him, his Ne isn't really verbalized, it more just comes out in quirky bursts of inventiveness, like recently cutting a hole in our unused garage door so our dog can go in and out during the rain.
I think being a hypochondriac might be related to Si devaluing, though I'm not sure. It seems to have something to do with not understanding what is going on with your body. Si users seem to know exactly when they are sick. There's also kind of a stereotype about SEEs being easily hypnotized by shiny objects. Duality in action
While I do agree that Ni has a very subjectivist and solipsistic character to it, I do not agree that Ne is more tangible than it. Because Ne is the realm of objective possibilities, you'll often find that Ne types entertaining idealistic possibilities which still heavily improbable. Yes, Rousseau (EII), it is possible that if we relinquish all societal controls, everyone will come together in peace and harmony. But is it likely? In contrast, Se types are much more likely to "call a spade a spade". I also think this is why there is a stereotype of ILIs being atheists. The ones who are in touch with their Te tend to mercilessly cull all but the most probable (or pragmatic) hypotheses.
Your sig has a quote from Bioshock, a game about exploring a hellhole full of tweaker junkies and human atrocities. It's also a sort of proposed prediction of the end point of unfettered capitalism (It's favorite talking point of most ILIs, like Marx, and Kaczynski). In contrast, when Deltas talk about the "evils" of capitalism, it is often done with a sort of retrogressive pastoralism in their heads. If Bioshock is not Se/Ni, I don't really know what is.
Also, I like the thing about Spain being an Alpha country. I've seen pictures of Barcelona, it looks like SEI puke haha.