I refuse to do builds for people if they are using less than 120/128 GB.... they are inevitably back here within 3 - 6 months asking em to clean the junk off their C drive because they are not proficient enough with Windows file management to do themselves. If you are asking this question, then I'd say you fall into this category. I would say that about 60 - 70 % of the builds of late have 250/256GB or more, the rest 120/128.
Another option of course is a SSHD ..... boots in about the same time as SSD and no file management issues. Benchies are of course better with the SSD but other than that, there's little difference in everyday usage unless ya talking large amounts of SSD space.