While searching for the Ideal motors I figured out few things which will give smooth flight and long battery life
1. Should be low Kv
2. Should have enough torque. May be the motors with more outer dia are better
3. Should have very low weight
4. Should be using very low current while on low load. but spinning bigger props
5. CNC light weight casings
6. Should be using Neodmium high temp magnets
7. High quality lamination 0.2mm stator sheet for high temp operation
8.High quality motor shaft.
Or anything else