Games should be good and short.
most games have good content but the lenght is too much.
Like butter spread over too much bread.
For example portal. It's very short, heck theres an achievement where you are supposed to finish the game under 30minutes. It's alot of fun squeezed into a 2hour game which makes you glued to your screen for 2 hours.
The half life 2 episodes are great too. Short and full for unique action. Not just some soldiers patrolling there and a couple of towns slapped on some island full of soldiers *cough*crysis*cough*