I've never flown Business class, but based on reviews and pictures I've seen online, I think I have a favorite
Short-haul: Recliner (angle-lie-flat just isn't comfortable for lounging OR sleeping. First: None
Medium-haul: BE Diamond - This is a good product for a shorter flight that still has flat beds First: Apex Suite - It is advertised as a High-density first, plus it has loads of privacy and space, plus it would still be 2-2 on narrowbody
Long-Haul: Business: Apex Suite - pretty much same reasons as first MH. First: Closed Suite - but different. Many closed suites don't have much privacy cuz you can look right over the door. My version would have floor-to-ceiling doors, 1-1-1 config on 777/lower deck 747 - plus it would have all the fancy gadgets of the EK first suite and the Etihad first suite. There would also be showers