What's your favorite gimmick?

[GotBot]

Gimmicks! Some people love them, some people hate them and some people vary, depending on the gimmick. this time I count down ten of them. Nope, not an exhaustive list and since I am not a gimmick guy, I am critical of most. However, I save three as my top picks. These are ones I actually enjoy, even if sometimes they are or are not successful in execution. What's your favorite?
https://www.youtube.com/watch?v=TinhNESPCgI

[elburrito]

The Transforming. Love it.

[Tonestar]

Combining. I have always loved it when 3 or more Bots or Cons could combine into 1 bigger robot.

[Roadhammer]

Hrmm...My top three gimmicks I think might just have to be combining, Headmasters, and the idea of Triple Changers (even if sometimes the third vehicle mode is somewhat phoned in).

[PrimalEnvy]

Light-piping, triple changers, combiners...

[Brawn84]

Light piping! I really wish Hasbro did it more!

[Mikformer]

workable items vehicle mode.
opening doors, hood, trunk, spinning wheels, seats, steering wheels, rotating propellers, opening cockpits, etc.

[optimusb39]

Definately triple changing. GOOD combining tech and a well hidden robot/vehicle design in a bots alternative forms. (I.e. no panels hanging amok or truck hoods or grills just chilling as a 'backpack')
A good example of the last would be the transformations of the original rid first edition lineup that expertly tucked away almost every piece of the vehicle by incorperating it into the ro ot while retaining posability and fair show accuracy.

[Shepp]

Seamless accessory/kibble storage.

[TRUCKvsGUN]

Weapon storage in alt mode.