Business Books: What do you like?

I read a lot of business books as I try to absorb as much data funneled into my brain as possible. The good ones I’ll even read multiple times.

It’s interesting to see how different the content can be from book to book. Some books are more theoretical (like Creating Customer Evangelists), while others are incredibly tactical (like The Art of the Start).
I’m curious – what style do you like? Theoretical or tactical? Basically, what do you like in a good business book?