I will probably go 512 GB. I got a 1 TB 14 Pro Max and could have gotten away with 256 GB even though I did take a lot of long graduation and prom party videos at 4k.
I stream most music and I delete my downloaded movies after I’ve watched them. I used web instead of apps as much as possible because apps are such power hogs.
My current phone is a 256 GB 12 Pro Max.
86.6 GB used on it so far.
I use more storage on Android phones.