Eder : He always my favorite companion, I don't mind he is non-romanceable,but I don't like his personal quest, Honestly, continue to search the answers about his brother and Saint's War is much better than to find his ex-girlfriend.
Serafen: He remind me of Hiravias.
Ydwin: I hope she can become a companion in DLC.
I feel like all companion personal quest is too short and tedious.