There was that one mission on Tuchanka(?) with the rachnis and I tried both options and noticed I got plus 5 renegade for both endings to that mission, Leave the queen or free her.
Don't link me to videos or anything, reading ftw!
Just post the name o' the missions and telling me what to say.
Best Answer
Renegade and Paragon-ness is not important in Mass Effect 3. It changes what order some interrupts will appear, but nothing else.
The only thing that matters is your overall reputation (your paragon + renegade).
Bioware finally lets me play morally gray (grey?) characters!