It's great fun that my grandkids get to see the costumes in 'Alice in Wonderland' or a doll with grandma's dress, but then they also let me know they're bummed I didn't do any of the 'Pirates of the Caribbean' movies.
One of the challenges with period costumes is, on a technical level, making the scale of different periods work on contemporary bodies. We're much bigger than what people were in older times.
I get more distracted by hair or a really bad wig than I do costumes any day of the week.
I'd say probably the most expensive costumes I've ever made were the costumes in 'The Planet of the Apes,' because of the research and development that went into them and the amount of layers.