I loved Rent when I first heard it, but it grew on me and so did Tick, Tick... Boom. Some songs are more interesting than others and sometimes the ones that never stood out at first end up being the best to perform.
I was brought up in an environment where my parents expressed their financial concerns in front of their children.
What convinces is conviction. Believe in the argument you're advancing. If you don't you're as good as dead. The other person will sense that something isn't there, and no chain of reasoning, no matter how logical or elegant or brilliant, will win your case for you.