I used to run CM nightlies but using ART it became a drag having to recompile all the apps every update. Now I use the M builds, stock kernel, stock clock speeds. It's fast, stable, and everything works how it should. I think I have animations set at .5x as well. Nope, .75x
I'd run AOSP, if it had a couple features that CM does.
I really like being able to change the color of the PhaseBeam wallpaper.
I really like being able to set the notification LED to a color and frequency of my choosing.
And the built in Torch app (I know it's available on the PlayStore) is a nice touch as well, and being able to set it as a drag from the bottom quick toggle.
The CM File Manager is great. Great application for those that don't want to pay for a file manager app that has root access capabilities.
And I love the cLock widget.
"Out of the box" LTE support is nice too.
Those things baked in to an AOSP rom and I'd be all over it.
LG Nexus 4 (mako)
Rom: CyanogenMod 11 M8
Modem: 33/02 hybrid