Thanks for that visual...

Pardon my geographical ignorance, but I've not yet visited Wales, nor have I read much up on it. I have visited Ireland (the Republic) and Scotland, read up some on them, and enjoy their folk music. As such I have these observations:
One is a land divided by a political boundary and religion, another by cartographical altitude. Both trace celtic roots and like to drink (whiskey and various forms of beer in one, and whisky in the other). And they both tend to fight amongst themselves, but will choose sides (often both) when others are involved. Both can use a nearly indecipherable language, and when speaking English, their accents can be equally indecipherable, depending on from where they hail. Simple enough. Maybe too simple?
Were I to read up on Wales and/or pay it a visit, what observations might I make?