I'm actually living in the Republic of Ireland, which is NOT leaving the EU, as is the UK (United Kingdom of Britain & Northern Ireland). The main possible problem with Brexit would be that, if it's not done in an orderly fashion, it could lead to the re-imposition of Border Checks between the Republic and the North - and it may make it difficult for the Republic's trade with other EU states, since most movement of good and services between the two currently take place through Britain.
The "Backstop" - which some of you may have heard mentioned in the news - is part of the withdrawal agreement negotiated between the UK and the EU. It specifically deals with the Irish border issue. Unfortunately some Westminster MP's want the backstop scrapped.
I'm optimistic things will work out. But I can't help wondering about those MP's that are calling for scrapping the backstop, and whether they have any grasp of the history of the relationships between Britain and Ireland, and the two traditions in the north of Ireland. Someone once said something along the lines of "those who aren't willing to learn from history are doomed to repeat it." I just hope that the clowns in Westminster aren't about to bring about a repeat of the three decades of The Troubles we saw in northern Ireland at the end of the last century.
[/end mini rant]