design patterns practical uses

Hi,

I was going through below design pattern examples at link

http://www.avajava.com/tutorials/categories/design-patterns

are these design patterns are enough to learn

Creational Design Patterns

Singleton Pattern
Factory Pattern
Abstract Factory Pattern
Builder Pattern
Prototype Pattern
Structural Design Patterns

Adapter Pattern
Composite Pattern
Proxy Pattern
Flyweight Pattern
Facade Pattern
Bridge Pattern
Decorator Pattern
Behavioral Design Patterns

Template Method Pattern
Mediator Pattern
Chain of Responsibility Pattern
Observer Pattern
Strategy Pattern
Command Pattern
State Pattern
Visitor Pattern
Iterator Pattern
Memento Pattern




If run all these examples am I good shape with all the design patterns. In real life i do not see i am using or applying much of the design patterns myself except may be the frameworks internally using them under-hood.


Which are the most important desing patterns that i need to focous on from the above ling.

please advise
Any links resources ideas highly appreciated. Thanks in advance