I made two characters and I noticed I get the Paragon Interrupt (the flashing icon that lets you interrupt a cutscene to say something Paragon/Renegade-y) when my character is mostly Paragon and I get Renegade when my character matches that. I haven't played with a neural character at all.
What determines which Interrupt you can perform? Do you just always get the Interrupt matching the morality you most commonly choose? Do I occasionally get the option of either Interrupt?
Best Answer
From the ME wiki:
Shepard always has the option to perform both kinds of interrupt. If you don't see a Paragon / Renegade interrupt, it's because there isn't one, not because of your character's reputation.
For instance, as a paragon Shepard, I was able to take the Renegade interrupts while boxing with James Vega.
What Mass Effect 3 has added is variable reputation interrupts, that change based on whether your morality leans blue or red. This does not mean, however, that you cannot perform renegade interrupts, or that you will never see renegade interrupts as a paragon Shepard - it just means that, on average, you will see more Paragon interrupts than Renegade.