Personally, the majority of my ancestors were from Scotland, Ireland or Wales and I would like to visit just to see where they came from. And to visit some of the significant historic sites and battlefields.

For me it would be kind of like going to the Civil War battle fields I have visited in the U.S. You go and walk around and look and what do you see? Well, some grass and trees, a few hills. Some cannon and a rock wall or two. Maybe a bluff overlooking the river, or a small pond in a field. Not much really.
But what I feel when I'm there is something very different. The fear and excitement of the people who are willing to give all for a cause they believe in. Or standing at Shiloh and looking down at the river thinking about what kind of men it took to attack an enemy holding the high ground when you have to drag all of your stuff up a bluff to get to them.
I'm sure I would have the same feelings at Culloden or Sterling. Or Normandy beach or any of the other battefields around the world.

Just seeing the historic places, whether I have any tie to them or not would be worth the trip for me. I don't have any romantic notions I'll see William Wallace or Rob Roy running through the highlands. Well, only in my minds eye. :-)