most valuable Patterns?

[Fei Ng]

Which is the most valuable Patterns?? the most used Patterns??
the most offen come up patterns? the most well know patterns?
Right now, i think it is the Bridge pattern and the Strategy patterns.

[a glover]

I find that I utilize the factory and command pattern quite frequently. The template pattern is rather valuable, in my opinion, too.

[Avijeet Dash]

ok,
most used patterns are iterator, singleton, factory method, template method.
most useful patterns, almost every pattern.
the ones i like most
facade, decorator, visitor, builder.

the ones i don't understand well
command, proxy (understand can't appreciate).
thanks