OK I just thought of a few quick wish list. (in no particular order)
1. I do not want ANY part of the board other than VRMs/MOSFETs hotter than 60C. I can use as many fans a case allows, but they all will be less than 1200RPM. (so this requirement pretty much takes care of voltage part as well)
2. I want absolutely functional S3, C1E/C2E/C4E/EIST up to Bclk 200. I do not want my CPU to run @4.0GHz when I'm typing a document, and I do not want to see any funky behavior after wake-up from S3.
3. I want to be able to use x20 multiplier without any hindrance when overclocking. (I could be a bit flexible on this one if everything else is fine, but this one is actually a good test how well the board handles QPI in general)
4. I want all manners of memory configurations to be fully functional. Say, if I want to use 4 sticks in a dual-channel configuration the board should handle it just as well as it does 3 sticks in triple-channel. (going from 1T to 2T is OK)
5. I want all PCIe slots to work as expected. That means I should be able to install single GPU in any of the available slot and at the same time I could use other slots for a network card or a network card in any slot. Same thing for two GPUs, as long as there are available PCIe lanes.
6. I want a flawless power delivery system. vDroop is fine but should be minimal without any compensation (will not use LLC)
7. I want BIOS to be as transparent as possible. I do not like board doing things behind my eye sight as a safety measure. (ASUS is good at this) Behaviors like this make my tweaking effort completely meaningless. If I set timings too aggressively, the system should crash instead of changing other invisible parameters. However, upon crash, the board should recover graciously.
There are a lot more, but let's just start with the above first.