Custom voice lines concept

This is great idea, i wish i could pick champion's quotes and use as emotes. This would be so nice, because for example Ryze have very good one - "I'm surprised you can string enough words together for that one. You need a break?" and i would like to use it whenever enemy use taunt or write something on chat. I think examples are easy to find - "None are worthy of my task... even me." if i am in 1 v 5 situation for example. I wonder what do you think about this.