Like on my PC, I like XFCE as opposed to Gnome or KDE because of the speed boost. But on my mobile... I am not aware of any such alternative to Ice Cream Sandwich (Android 4.0).
Is this simply because phones are a bit more hardware specific and cutting edge and therefore more complex to support?
If I had the option I'd bung a crazily lightweight OS on there so I could run more impressive games and apps.
I know this isn't an Android forum but s'all Linux!
... plus I bet the guys on the Android forum won't be as cool as the people here on the Mint forum!