There is a limited voice response set for NPC crew members. Initially it was great to have a little quasi-conversation about combat activities, but the limited responses just became annoying and I dropped the volumes down on them. I would really appreciate a well-crafted, deep set of voice responses - possibly with random time delays after issuing fighter orders to enrich the NPC crew member experience. Possibly just random chat pops about previous kills, dreaded mythical opponents, thargoid ponderings etc. I would drop a few bucks on an NPC crew member voice pack for sure.