In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this Fatwa:
1- Fasting the six days of Shawwal defines your character and builds you as a Muslim.
2- The reward of fasting six days of Shawwal is immense.
3- By fasting the six days of Shawwal, you are getting the obligatory-type reward of fasting the whole year.
Sheikh Abu Eesa Niamatullah answers these questions in this Video: