Yeah, my small Steam library is 120GB (thats just the few installed games), 80GB of photos, 40GB of ADF's and so on... 256GB dosent cut it anymore for an "average" user, especially since Windows + installed 3rd party programs can take up 60+ GB. 

If I had a 256GB SDD, Id throw my OS and programs onto it, and one or two games that tend to do a bit of disk access... the rest Id leave on "mechanical" drives.