For me it's more that the NPC crew look like they are made of melted plastic, some in-game characters look great (but not necessarily that they are all attractive) just more realistic, and please FDev put the crew in the cockpit unless they get demoted to the cargo bay because another real world player joins your ship.
A big problem for me is that flying in any ship feels as cold and lonely as flying in the smallest single seater. It's not right. Big ships should have more going on in them, bleeps bloops, more creaks, sound echoes, visible crew, even occasional NPC crew 'chatter' when not much else is going on - e.g. getting a Hutton Mug.