Do I use POST variables or routed vars in URL?

[eluser]luismartin[/eluser]
Just one question I forgot to ask:

If I use your approach, would you recommend to declare the controller method without any given parameters??

I mean, if I declared it this way:

Code:

public function mymethod($key1, $value1, $key2, $value2) {
....
}

and in some cases I only needed $key2, in order to avoid something like
mymethod/key1/0/key2/value2

would it be better to just do this?:

Code:

public function mymethod() {
  $my_args = $this->uri->uri_to_assoc(3);
}