Best things in the joint family are
1. learn to share resources better like kicthen, money and many more things... it is more of combined resources put into use together. 
2. elders are watching on us and teach us right things 
3. learn to adjust to people 
4. learn to deal with people diplomatically, coz if u have to live under one roof u cant be rude to everyone all the time. 
5. be more accepting of people and their different natures 
6. you can share ur problems with few people at home, coz someone in joint family can always make time. 
7. better attention to individuals by different family members. 
8. more loved 
9. learn to make best out of what you have 
10. learn about the importance of different relations in our lives.