In the words of Tommy Tiernan, "Money doesn't suit us, but we gave it a good lash".
Yep, we spent in the good times, that's why they were called the good times. If we'd kept all our money and not spent, they wouldn't be the good times, they'd be the 'Getting ready for the bad times times'. (Another Tommyism).
We came back in 1998. I'd left in '87. Dh is a Londoner and was desperate to live in Ireland ever since he first set foot on Irish soil. We are here to stay. We are not in negative equity on paper, we have a decent amount of equity in our house still, but that's on paper, but we are also trapped.
The reality is, we could not sell even if we wanted to. Noone is buying. Certainly not the type of house we have (4 bed, detached on an acre in a rural setting). The market is flooded with houses like ours.
OP we are descended from the survivors of the famine, we are descended from the ones that stayed, that toughed in out and survived. That will stand to us, and that's why we're all still here, making the best of it.
There are so many reasons to stay, it's not all about money anymore. I agree with everything Maryz said, this country is filled to the brim with that which money simply cannot buy.