Six Words About Casual Games

According to Tweetdeck, one of the trending:worldwide topics on Twitter is 6 word stories.

I've asked for 6 words about game designers, 6 about programmers, and 6 about wargames, with interesting results.  Now I want to ask about another type of game.

Can you say in 6 words what makes casual games interesting--or not?  (And you'll have to decide what "casual games" are.)