Nana's original character was obviously terrible, but I appreciate that it's one of the few issues Jess actually realized and then ret-conned into something proper in later seasons.
Her identity issues and family trauma clearly weren't a part of her original concept, but it's very compelling all the same, and watching her learn that she can live and love without acting like a simple, palatable caricature is one of the best parts of Starlight for me.