Having the OS on the SSD will be the biggest benefit. Photoshop CS6 loads a little faster on the SSD, but not a huge amount.
Yes games will load faster on an SSD but thats not really an issue on modern systems. As i have a dedicated drive for Steam/games i dont have them on an SSD. My games drive alone is over 700Gb. Yes i could use Steam mover to move the games i play, but i honestly see no point.
Having documents/music etc on an SSD is a total waste as you will see **** all difference in loading speeds etc. All your doing is wasting the space that your paying a premium for.
Its really not that difficult.