If you want easy to navigate malls, stick to the SM Malls. Parking's never enough (where is it ever enough?) but at least it's straightforward and navigable.
if you want to spend hours going around in circles- be it in the malls itself or the parking- go to the Ayala Malls.
Similar establishments are grouped together at SM making comparison shopping a breeze. Food choices are much more plentiful at SM too.