You will notice a huge change if you haven't been here for 40 years. The country has gone from a largely agricultural-dependent economy to one based on finance, light specialised manufacturing (particularly computers and components). Agriculture is still important but not the sole means of supporting the economy.
The major cities reflect the changes most with new, dazzling banking sectors replacing the sometimes dreary past. You will find the 'real' Ireland in the more remote parts; in my opinion the north-west of Ireland is the most untouched by Ireland's progress, particularly Counties Donegal and Mayo. County Clare (Ballyvourney and Ballybunion) is still a far cry from the hectic activity of Dublin or Cork, but I doubt whether you can "reek a living" through your singing - but I might be wrong!
The short answer is that you can still escape the evil ways (!) of PC - while we have stupidly followed the UK down this path, particularly with health and safety, there is still some common sense being applied when interpreting PC and other EU legislation. I might be so bold as to say the the UK interprets EU law to the letter, whereas everyone adapts it to their own benefit and circumstances, including the Republic.
Always follow the ancient Irish advice for keep friendships healthy when talking to Irish people - "Never discuss religion and politics with your friends".
I'm not sure how much relevance the two newspapers mentioned by #1 will have to Ireland (although they do publish Irish editions, they tend to be adaptations of their English editions). If you want an impression of modern Ireland, then check the websites of the Irish-owned and run newspapers:
The Irish Independent group
The Irish Times
I hope you decide to visit and have a great time when you do!
Edited by: beefyboy