really interesting event has very simple definition - event that influences power balance.
Not sure if I'm getting the wrong end of the stick here, but there are two sorts of 'making things happen':
1) Things happen that cause battles to be fought, regions to be won and lost, rulers to be overthrown, generally politically motivated
2) Things that give you something interesting to read and react to other than automated turn-change messages, that give interesting roleplay opportunity and some memorable moments
Trying to do (1) does fit your definition. But trying to do (2) does not. Having just returned to see Battlemaster after three years away, the things I most remember from my previous time here were the light-hearted, frivolous-but-not-silly roleplays we had in Falasan's Black Army, surrounding the impossible game of Skat, and the mysterious lure of Loronzo of the Mist. Neither of these had anything to do with power, neither involved our council members or dukes with any regularity, but both were interesting (and entertaining).
I find that trying to get involved in political roleplay and communications is extremely hard, since so much of it happens behind closed doors that even if you do try to get involved, you are so ignorant of the political situation that all you can do is make your character appear similarly ignorant. Whereas things irrelevant to politics and power are easier for everyone in the realm, newbies included, to be involved with. And being light-hearted doesn't mean you have to be being silly like fighting off badgers let loose by elves.
---
As a new player (again) now, I'm back to finding that there are very few messages of any kind to read that aren't automated ones, and fewer still that offer any sort of interactive opportunities. I don't think it's because everyone just logs in, does nothing but click a button, and then logs out again. Because when I message one of the senior realm members personally, I often get a good reply. I think it's because so many of our more active, better roleplayers are in senior positions, and they then only message and roleplay with other people in senior positions, so that all the more interesting messages are hidden from the view of a normal boring knight.
A few do provide something entertaining, and that's great. Some are really read-only as a fair number involve senior people loving/hating/etc each other in private, and a very few are easier to interact with either then, or at a later date. But others will go for weeks without ever messaging realm-wide which I think is a shame.
So - a plea to rulers/dukes/councils or even people who only ever message their elite army or their lord-comms-group - if you're sending off ten goodly messages in a week, make at least one of them realm-wide and preferably non-private and non-political, whether it's sparking off something new, or continuing some other realm-wide roleplay that's already happening. Even if it's just inviting everyone to your fortress for a banquet or writing your duke into a mild predicament that another knight could come and join.
I try to do this myself, even if I'm the only one posting and even if I get no replies (so apologies if you're sick of 90% of realm-wide non-automated messages being from me!) as after a while I trust people will become more familiar with my character and more confident with their characters interacting. Will see how it goes, but for now my optimistic hat is on and I'll keep on trying until the OOC messages turn up to tell me to shut it
It's either that, or go for the method of trying to powergame your way into a position of high power just in order to have something interesting to do/say, which I am trying very hard to avoid.