pogo is one the absolute best websites for the casual game player.  But beware, because it may start out casual but you will become addictive to the quest for badges and higher ranks that pogo awards to it's paid members.

er you arWhethe into card games, puzzles, word games or adventure games - it has the game you are looking for.  Offering both online games or downloadable games that you can try (most are for about 1 hour trial), it is a complete gaming site!  And the people you meet are very, very friendly and helpful - which comes in handy if you don't already know the game you are trying...