I actually quite like Tarquin - I know a lot of people feel he's way too powerful or prepared, but I've never found that an issue. (And on the preparedness front, if I were a D&D player whose party had spent ten years or more ruling over most of an entire continent, I'd have amassed a pretty awesome collection of magic items, too.) But I do kind of wonder how he'll react when he realizes he's not the main villain of his son's campaign.