Unlock the following bonuses by completing the corresponding party member's Loyalty missions. You will also unlock their individuals skills for Shepard, alternate costumes, and increase the chance for surviving the suicide mission. Note: Complete the Advanced Training research upgrade for your ship to be able to select the skills:

BONUS - LOYALTY MISSION
Armor Piercing Ammo - Archangel's Loyalty mission.
Biotic Barrier - Jacob's Loyalty mission.
Dominate - Kill Samara during her Loyalty mission and have Morinth replace her.
Fortification - Grunt's Loyalty mission.
Geth Shield Boost - Legion's Loyalty mission.
Inferno Grenade - Zaeed's Loyalty mission.
Neural Shock - Mordin Solus's Loyalty mission.
Reave - Samara's Loyalty mission.
Shield Drain - Tali's Loyalty Mission.
Slam - Miranda's Loyalty mission.
Warp Ammo - Jack's Loyalty mission.