Dishonourable mentions:Bonecrusher: claw shouldn't count as an automorph. There's nothing "auto" about it. Should not have been advertised as such, just as Barricade or Longarm weren't.
Ratchet: Absolutely useless leg feature.
Blackout: First it went halfway, then it went no way. Broken and useless.
I really think something is worthy of being called automorph only if it really has something significant to do with the transformation. Parts move and shift, such as Ironhide, Leader Megatron and Prime, BB feet, and others.
I like the automorph feature, except for the fact that it makes the toy less solid to handle, and you've got to handle with care. It appeals to my sense of fascination for the engineering that goes into these toys, but not to my preference to transform at least 2 or 3 each day.
Of course, I'd exchange that for better articulation, greater durability, and more detail.
I'd give all that up for stronger missile launchers and flying fists that can be useful against evil like the weapons we saw in that Shooter movie.