And HOW do you load them? Are you selecting download options in streaming services or are you loading hundreds of files each 1GB+ that you "procured" ?
As has been noted already, of the activities you posted the Movies one is the main activity that would require large amounts of storage - so how you intend to do movies on the device will drive the final outcome on storage requirements.
Personally I only keep what I'll likely watch on my iPP which is a mix of a few dozen rips and some downloads in Netflix so 256gb is fine for me.