1.Bonsai tree requires less branches.The plant will get a decent look by 5 no.of branches.But there are no hard and fast rules.
2.Secondly,the plant will get the matured look by the exposed roots.
3.The flow of the trunkline and neatly arranged branches matters in a Bonsai.
4.Every branch has a front and back look.
Bonsai trees are done by Perennial plants that have long life.And only small leaf varieties can be done.The plants which have compound leaves varieties do not look pretty. eg.Curry leaves plant,Gulmohar,and Neem.But now everybody is experimenting,they are doing Bonsais with these varieties also.In fruiting varieties only grafted trees are made in to Bonsai.They are giving good results for grafted plants.