Ordinarily, I'm not an obnoxious person (or at least I try not to be). If the matter is a silly one (like a little debate about something like which actor played what in some movie) I don't even have the urge to say "I dol you so". On things that aren't quite as insignificant/silly as that but aren't all that serious either, even then I'm not one to need to enjoy even thinking "I told you so".
I'm a secure person. I have no problem with being wrong and conversely, no particular problem with being right (and by "problem" I mean having the need to say "I told you so", or even spending more than a fraction of a second thinking it. I suppose with the more day-to-day/less significant matters (even, sometimes, when they cause inconvenience or some problem if the wrong person caused it), I don't care much. I don't get joy in someone else's being wrong, and I like to try to be the proverbial "bigger person". There's something to be said for aiming to be the bigger person. (Actually, I prefer to think of it as taking the high road. I don't need to be "bigger" than other people in my own head. As I said, I'm secure. ) Also, however, I'm very careful about making sure that if I say "I think x" that I've spent plenty of time and effort going outside my own head and making sure that what I think, or how I do something, isn't in conflict with what, say, well established experts say. It's not that there's ever been a time when I haven't questioned a thing or two that experts say. Usually, though, such times have been fairly small issues and/or things that I've questioned because something I've seen for myself doesn't match something that is the latest conventional wisdom. Even with that, however, I've always pretty much been "a mainstream-expert believer".
In any case, the world is full of people who think things without being good and sure they've backed them up. It's all full of people who listen to lies, pull things out of their imaginations and/or out of the blue.
There are some things that I take far more seriously than others, particularly things that have affected me and/or my family (particularly any/all of) my three now grown children.
And, while I won't say more about any of this, or which matters I have in mind; while I still may, in some instances, try to be the bigger person, I have no intention of not, at least, mentioning that I have a huge, huge, number of "I told you so's" for any number of people.
For now (and maybe forever), all I'll say is "so many 'I Told You So's' and so little time. I'm not entirely sure there aren't at least a few more "I told you so's" that have to be established, but until every last one of them is I'm not through waiting to know/see that they have been.
As I said, I know there's a big "element of cryptic" to this post. I'm writing it for me, rather than anyone else.