This evening I have been assertive.
It's not something I make a habit of – usually I like to ask people's permission before I do it, and if it doesn't fit in with their plan I don't bother.
(That was a joke, by the way.)
But joking aside, it's not a trait I'm famous for.
Nevertheless, I was asked to attend a meeting tonight to help with something I have some interest in, but not much enthusiasm for. And I said 'no'.
Which is so unlike me, I'm still a little dizzy with surprise.