It appears that the poll question is asking about forgiveness between humans, not from God.
Should forgiveness be conditional on the basis of the offender's repentance? No. Should forgiveness be completely unconditional? Also, no.
Forgiveness extended too soon leads to resentment, because we need time to process our emotions in the wake of an offense. Forgiveness withheld turns into bitterness, hatred, and a desire for revenge.
Forgiveness is releasing the person into God's hands, recognizing our own need for forgiveness from God. It is not a restoration of relationship, which rightly requires repentance and, as appropriate, restitution.