Most satisfactory two letters are "WE" - use it.
Most poisonous three letters are "EGO" - kill it.
Most used four letters are "LOVE" - value it.
Most pleasing five letters are "SMILE" - keep it.
Fastest spreading six letters are "RUMOUR" - ignore it.
Hardworking seven letters are "SUCCESS" - achieve it.
Most enviable eight letters are "JEALOUSY" - distance it.
Most powerful nine letters are "KNOWLEDGE" - acquire it.
Most divine ten letters are "FRIENDSHIP" - maintain it.