For countries which were invaded by the Vikings, is it seen as good, bad or indifferent? And for Scandinavia, is it viewed with pride, shame, a bit of both?
In Ireland I'd say it's surprisingly neutral, at least compared to later invasions by the Anglo-Normans. The Vikings trashed our monasteries, ending something of a golden age, and took Irish people as slaves. But they also settled here and founded our first towns.