I'd love to attend a D23 event. I've had the D23 Expo on my radar, ever since all the news and feedback from the first event last summer. I'm also very interested in the upcoming WDW D23 events -- the scavenger hunt and Destination D events scheduled for next May.
I can't swing both (and I'm not sure yet if I can even do one of them!), but if I had to choose, which one would be better?