Pictures take up the majority here. I do not keep them on my primary (SSD) harddrive though.
Then there's also video, which is getting more and more popular (gopro, drones) with filesizes not really going down much due to things like FullHd and now 4k.
Edit: I did not register your 'nothing fun' point properly. I guess you mean a pure working machine? Then no, I do not see a reason to have a hard drive above say 512gb. Do keep in mind that code-bases grow quickly though, I have about 25gb of source code on my main work machine.
Then there's also video, which is getting more and more popular (gopro, drones) with filesizes not really going down much due to things like FullHd and now 4k.
Edit: I did not register your 'nothing fun' point properly. I guess you mean a pure working machine? Then no, I do not see a reason to have a hard drive above say 512gb. Do keep in mind that code-bases grow quickly though, I have about 25gb of source code on my main work machine.