Whats your favourite Movie Monster?

Movie Monsters have graced our screens now for over 100 years dating back to around 1915 with films like Paul Wegener's silent film The Golem. With so many great movie monsters out there, From Slasher film icons that we all grew up watching to giant monsters like Godzilla. I would like to know what are your favourite Movie Monsters with a brief explanation as to why you choose your specific monster. You can list as many as you'd like and can even categorise them into human monsters and other species if you'd prefer.

My favourite Slasher is probably Jason Voorhees - One reason why is because I find him interesting, since most people think that his mother controls him to do what he does. But it is in fact the opposite which I find to be true. Since during the first movie he is clearly shown as speaking through her telling her to kill for him. That and the infamous kill ma score which plays through every film. This would mean that unlike other slashers (not only does he have a higher kill ratio than anyone else) he appears to have more abilities than anyone else.

My favourite none Human Monster (although they can look human) is The Thing (as in John Carpenters 'The Thing' and not Ben Grimm). This is because the thought of a species replicating another person (or any living organism) whilst killing the original and taking over their life, used to really creep me out growing up. It also used to interest me that the thing didn't have any set form and could change its appearance at will, making it a monster with limitless possibilities.