I like these theories because they don't refer to "who is Red John?"

They explain all the loose ends from the show

Theory 11340:  http://www.whoisredjohn.com/See-a-theory-Red-John/11340

- Why Patrick never went to Rosalynd Harker
- Why Patrick made a list and why these people really made it on the list
- How Red John got the list
- What was the meaning of Patrick saying Red John killed the PI? How does it fit into his plan?

Theory 12782: http://www.whoisredjohn.com/See-a-theory-Red-John/12782

- Who are Reede Smith, McAllister and Bertram?
- What happens in Patrick's house?
- What the hell is happening in Great Red Dragon?

Everything has been going to Patrick's plan. The Mentalist has this game won.