I'd stop the canned answers for my character & recycled alien language sound bytes. Improve the body language animations. Examples: shakey hands, break neck then turn body. Flesh out my characters responses more. More companion interaction during dialogue. More banter between companions (Ever go back and watch some Dragon Age stuff on youtube? What happened to that?) Better companion missions. aka stop the walk off camera, fade to black, fade back in, "Hey that was crazy!".
Repercussions for my choices vs companions morals. Example: Me being a dark side homicidal maniac and companion disapproves whenever I blast someone in the head, but still loves and wants to marry me.