Frequently when having conversations with various colorful (literally) characters the option appears to interrupt them with either a Paragon or Renegade action. Obviously, I'm a commander with a lot on his plate and don't always want to wait for the other guy to stop yapping. On the other hand, I do want what's best for Earth and jazz, so I want to get the most out of these interactions. It's quite the conundrum, really.
Thus the question: Is it always or almost always better to use the interrupt option as opposed to letting the other person finish talking? In other words, are the rewards for interrupting always better than those of waiting it out?