My biggest gripe (I am sure I have overseen it), is that while I can make myself happy by transitioning everything from BAD to GOOD until the next reboot, I have no way to find out what this actually does.
E.g. how would you learn that "Turn off NMI watchdog" translates into
"echo 0 > /proc/sys/kernel/nmi_watchdog" (this took me quite some googling and one one of the easier things to find out).
I would appreciate if powertop could tell me what tweak it actually applies when hitting <ENTER>. Teach me to fish, don't just hand me one :-).