it really does only take one person. i used to play with a group of friends and there was one person who took everything so fucking seriously. we were all pretty casual and would laugh about things blowing up in our faces, but they were one of those 'serious gamers' who would get so pissed any time any little thing went wrong. whenever they started in, the rest of the group got grumpy too, and it wasn't fun for anyone. we'd all usually go to bed mad