Northern Ireland has no real identity, although people are proud to be from Northern Ireland. Some call themselves Irish, some Northern Irish, some British. Time for a proper identity with new anthem and a flag all can identify with. Not that it would be easy of course, but worth the debate in my opinion.
Yes, I do think that Northern Ireland should become an independent nation at this point. The rest of the United Kingdom doesn't see them as being a real part of their country. God knows the true Irishmen in the Republic don't want to deal with that mess. Let them be their own country.
There are many Providences and states that our looking at the possibility of seceding from their current country. I believe when the population of that country agrees with that idea then they should definitely seek out ways to make it a reality. If the population of Northern Ireland wants to be independent, then it should be allowed.
Northern Ireland should not become an independent nation. They are already part of Ireland, and should not defect. This would only result in one outcome, and that would be a civil war. There is nothing wrong with how things are set up now, and there is no reason to change it.
It's fine the way it is. If the world in a whole makes things more complicated by becoming independent countries, when will the world truly unite at least to the point of understanding one another and working together in a productive society. So no, I don't believe it should be independent.
Northern Ireland is the angsty teenager of the United Kingdom. Becoming a nation is about more than just the label you put on yourself. Currency, banking regulations, national agencies for everything from food safety to building codes require years of effort, and the (relatively) minor differences between the Irish would seem inconsequential in the face of those realities.