ASMedia USB 3.0 driver (if you have 3.0 ports)
Intel Rapid Storage Technology driver (if you have Windows 7 + a SSD)
Broadcom Lan driver (if you're gonna use LAN)
VGA driver (if you're not using a discrete graphics card with it's own driver)
The rest are optional. I have the realtek audio driver just for customizing audio settings. Avoid the Lucid driver... I've heard it doesn't work so great and cause issues.