Can You Tell If You Will Enjoy A Game Or Not Without Playing It?

[Hiro]

I can tell if I get an overview of the plot of the game generally, a good story makes a good game for me For games without stories, then it's a bit tougher, generally I watch gameplay videos for a bit first, and that gives me a good idea of if I'd like the game or not.

IMHO, story is very genre dependant. For a an RPG is critical. But for an Action or ARPG it's not really critical. I have enjoyed many hours of Diablo and I barely have a cooking clue what the story was about :-)