What should I learn next

My wife is a real help to me. Her current contribution is her opinion about my learning schedule for the next six months.
I laid down some choices, what issues are concerning me about each choice and in what order I would like to learn them.
The candidates were:

1. Oracle


2. MongoDb


3. WPF 4

The winners were WPF 4 and MongoDB. WPF 4 will became my new build, virtual machine startup reading and MongoDB will became my evening exercises technology.