Terminal 3 is awesome! It is new, amazingly clean and has free wi-fi that doesn't kick you off like in the main terminal. Security was surprisingly unoffensive and cool! They were like, "leave your shoes on, leave your belt on, leave your ziplocks in your bag." I was seriously throwing my sandals in the bin and unzipping for my clear bag of toiletries when the security guy repeated the instructions again! I told him he was confusing all the LA people and he just laughed like he knew.
There is a Coffee Bean and a pub in the terminal as well.
Hint - you can take a free shuttle to terminal 1 outside door #55 if you need to meet someone in the main terminal.