I think the diffrence between Autocrat and Dicatator is the diffrence between Bull Crap and Horse Crap: NOt enough to really matter on a practical point of view.
And it is perfectly possible to dislike both Bush and Chavez.
And BTW,the spectacle of someone elected to office becoming for all intents and purpose a dictator is common. The critea is not how someone came to office,but his behavior when in audience. If someone is elected by 80% popular vote,but moves to limit individual rights,supress all oppostion to his regime, and assaults basic freedoms (the right to own Private Propety,etc) then he is a Dictator I don't care if he was elected or how popular he is.