I think it be awesome if you could tie in a /say Text with activating a skill, it has no other purpose that to say something when using an ability. Be able to set percentages of how often its said so its not spamming everyone all the time, and have up to 3 different lines that it picks at random. Of course other players can turn it off whenever they want so they don't have to see your spam. It would be most useful with group utility spells and Ultimates.