This has been a concern of mine for a while. I jungling 85% of the games I play. I pretty much have all the junglers that are great at jungling. My issue is, knowing when to choose others. I basically always play Maokai, Skarner, Mundo, Shyv, Shen, Lee. I just can't figure out why I would want to play the others.
I have seen pros choosing ones like Warwick, and Cho'Gath, and Amumu. Now while I understand their general purpose in the game. I don't see when it comes to, say a tank, I would choose over Mao or Skarner.