You shouldn't need convinced. Everyone has to make up their own minds. These threads pop up all the time. People just like hearing people talk about classes. There isn't much difference at all between Spriest and locks. 1) you came to a lock forum. 2) you want "Dark Fantasy". 3) You're answering your own questions. If you like the dark fantasy, play it. If you don't like the playstyle, then don't.
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And affliction is boring as shit.