"Do you buy games just because of the name?"

Quite simply, no.

Gothic was a prime example - I loved the series right up until Arcania but no amount of label-marketing would ever have convinced me to buy that shoddy excuse of a game. But then, I'm a connoisseur and not someone who takes whatever rubbish is proffered

A label will naturally pique my interest but that doesn't necessarily mean it will win me over.

Fallout 3 is another prime example of label-marketing--it had little-to-nothing to do with the original games, no mention of past events, of the NCR; the Brotherhood of Steel didn't hold a single philosophy original to the first games. It sold because it was Oblivion with guns; not because it was a formidable RPG.