I'm just biding my time until they come out with incandescent illuminated heating elements to light my house with. Just repackage the bulbs as something else and sell them at agriculture stores. Hell, Ali Baba will still make them and ship them to us.
Dingle Peninsula, Ring of Kerry, Cliffs of Moher, Rock of Cashel, Healy Pass, Conor Pass, any early house(morning pub) in Cork, Giant's Causeway are all great. I wouldn't bring up heritage unless a local asks you about it. You'll just get an eye roll otherwise. Best time to visit is in the dead...