what are the changes one plan to incorporate in his personality to be an ideal colleague & friend?

Answer 1

In my opinion, the most important attributes in any interpersonal relationship are LOYALTY and TOLERANCE...... These includes refraining from backstabbing, being there when a friend needs help or a sympathetic ear, and acknowledging that people are different and not sitting in judgement on them.

While we all grow and evolve in the course of our lives, it is questionable if you can "change" your personality. Having said that... if motivated, you might be able to cultivate attributes you admire and incorporate them into your own behaviour over time.