I have a type A, type D w/A core and type E (DS stickered).
The type A cuts corners well and doesnt lock up. The type D turns fast and feels better in my hands but locks up sometimes. The type E is turns crazy fast, cuts corner very well and doesnt lock up much. But I like the way the type D feels the best. My best times come with the type E though.
Im dying to get a type C and C4U DIY.
Other than switching the core, I havnt had any success with hybrids. Ive tried the A core/edges/corners with D screws/springs/centers and didnt like it. Also tried the E core/springs/screws/centers with Rubiks edges/corners and hated it.