How many perceived leaders out there, do you know are strong? In most cases, strength sometimes gets confused with aggression. Typically when aggression comes to the forefront, any topic of conversation usually disappears.
Being strong means standing by your beliefs and making the right calls that benefit your wider organisation. By sounding out your strengths in a positive manor will usually put you in good light of others around you. In doing so, you will be showing your flexibility and cementing another relationship in your corporate network.
Rest assured, I have never seen an aggressive approach to any form of communication yield the desired positive results. Next time you have a feeling of aggression, remember to ask yourself what specifically are you hoping to achieve.