Player file that can be collected:
Game settings, and last session information
%UserProfile%\Documents\StarCraft II\Variables.txt
Account specific settings:
%UserProfile%\Documents\StarCraft II\Accounts\Unique_Blizzard_Profile_ID\Variables.txt
Depending on the user behavior he/she may have multiple Profile IDs per Blizzard account (mine has 5 – 3 on americas, 1 on europe, 1 on asia)