Looking at your cards

[magiluke]

I was reading another thread that sort of branched off on the topic of when to look at your cards, so I figured I'd make a new thread, raising that very question: When is the best time to look at your cards.
I've heard some argue not to look at them until it is your turn to act, as to not give too much informations about your hand to the opponents. Also, you get to look at all of your opponents before you, and get minor bits of information about their hands.
On the other hand (I guess it's a pun), if you wait until last minute, everyone is there looking at you.
Is the best time when you first get your cards, when it is your turn to act, or somewhere in between?