He loves his time off. He lives on Hawaii. People who live on Hawaii like to do nothing.
Yeah, I also have an impression that his "days off" are spent with family.
He does love playing; "walk into a bar, and that old guy playing blues in corner would be me". I don't think guitar has any less place in Dave's life compared to Adrian's, it's just that Dave doesn't seem to care about projects and recording and stuff.
I like H's style more than his, however, Dave seems more natural in his playing. Not just sound and the smoothness of legato, but execution. It's like that performance of David Gilmour and B.B. King. Gilmour's lead parts were well prepared and executed, more fitting to my ears than B.B. King's, but the King just tosses solo out of his hand. A vague explanation, and a most fitting one.
On one of the last DVD documentaries I had the impression that Dave was one of wise remarks. Doesn't speak often but when he does...
I think it's on Flight 666. Bruce tells how they get into all sorts of discussions (mostly "political"), Dave just sits back, and when someone asks him his opinion, everyone is left in awe afterwards. Something like that, anyway.
When on topic of Dave, his best solos came when Adrian wasn't around. IMHO, due to fact that he had to fill in that precise, melodic style Maiden was left without. Example - Public Enema Number One; wow.