Ugh, this is really hard. It would probably be a tie between the Bat-family statue and the JLU statue. I only bought the Ame-comi because I'm a completionist. The Bishoujo is nice but the breasts are ridiculous (and the staff broke almost immediately). I like the Joelle Jones but it's not my favorite costume or pose.
I had someone separate Nightwing and Huntress for me and was able to recoup the costs by selling Nightwing (who was really awful). I do wish it was more detailed. The JLU statue is fantastic but I don't have much of an attachment to that version because she was only in a few episodes.
I recently sent off a 1/6 scale kit to be painted by Vince Vell and that's probably going to be my favorite.
I had another 1/6 kit painted by Annya and I really love that one. My 1/6 ARH is going to need a major make-over but it's the 90s costume which is my favorite.