Best Games for a Competitive Family

[EchoUnderfoot]

Every holiday season, my parents, adult siblings and I cycle through the same batch of games--Uno, Bang and Hearts. We are all fiercely competitive, and this leads to some very stressful game play experiences. This holiday season, I'm looking to try some new games with my family that will appeal to our competitive natures, but also won't dissolve into bickering about rules or arguments about point values. 

Card games or games with a simple set of rules would be best. There are seven of us in all and we are all over the age of eighteen. Honestly, I'm open to any suggestion at this point.