I have about 75 GB free on my hd because I tote a 1TB Samsung T7 (with 300GB avail). The stuff on my internal ssd taking up the most space is Adobe Creative Suite, LuminarAI, Microsoft Office, Logic Pro (data on external), Steam with 1 game, Planet Coaster, Final Cut, Motion, lots of miscellaneous normal sized apps.
The T7 has Logic Pro data, iCloud Photos, Crossover pc games, Parallels with windows 11 + Steam and pc games, misc videos, etc.
256GB is probably plenty for the average user. It just cramped my style because I don't like toting external drives. I regret not getting the 1TB.. if I had, I probably wouldn't even consider the Macbook Pro. But since I need to upgrade the ssd by changing computers, I am considering it.