French Grammar: Impersonal Expressions, Will, and Emotion in the Subjunctive

Several impersonal expressions in French are followed by the subjunctive mood. These structures often assess the necessity, possibility, or merit of a particular action.
Ce n'est pas la peine que…: Literally translates to "It is not worth the effort…" or "It's not worth it that…"
Il est bon que…: Translated as "It is good that…"
Il est dommage que…: Translated as "It is a shame that…" or "It is a pity that…"
Il est essentiel que…: Translated as "It is essential that…"
Il est étonnant que…: Translated as "It is surprising that…"
Il est important que…: Translated as "It is important that…"
Il est indispensable que…: Translated as "It is essential that…"
Il est nécessaire que…: Translated as "It is necessary that…"
Il est possible que…: Translated as "It is possible that…"
Il est surprenant que…: Translated as "It is surprising that…"
Il faut que…: Translated as "One must…" or "It is necessary that…"
Il vaut mieux que…: Translated as "It is better that…"

The use of the subjunctive is mandatory in the subordinate clause of a sentence when the main clause conveys specific types of meaning.
Requirement: Use the subjunctive in the subordinate clause when the main clause of the sentence expresses either will (desire/command) or emotion.

Expressions of will trigger the subjunctive in the dependent clause because they represent a desire or demand imposed upon someone or something else.
demander que…: To ask that…
désirer que…: To desire that…
exiger que…: To demand that…
préférer que…: To prefer that…
proposer que…: To propose that…
recommander que…: To recommend that…
souhaiter que…: To hope that…
suggérer que…: To suggest that…
vouloir que…: To want that…

When a speaker expresses a feeling or an emotional reaction to a fact or situation, the subjunctive mood is used for the action being described.
aimer que…: To like that…
avoir peur que…: To be afraid that…
être content(e) que…: To be happy that… (Note the agreement for gender in 'content/contente')
être désolé(e) que…: To be sorry that…
être étonné(e) que…: To be surprised that…
être fâché(e) que…: To be mad that…
être fier/fière que…: To be proud that… (Note the masculine 'fier' and feminine 'fière' forms)
être ravi(e) que…: To be delighted that…
regretter que…: To regret that…