There was an Eclipse asari mercenary hiding in a room and cowering and claiming she'd just joined thinking she was going to be a badass hero,not realizing she was going to be a drug dealer and stuff, so I let her go without using the renegade interrupt to kill her. Later on in the same mission I found an audio log of her boasting about her first kill. I felt so mad about letting her go, ffffuuuu...so I just decided that Shepard must have a soft spot for asari chicks since I had him bang two different ones in the first game (consort and Liara), so he always lets asari off the hook. Shepard's such a horndog.

I learned from my mistakes, though. During the Thane recruitment mission, I had Shepard do a paragon interrupt and push the Eclipse merc off the roof of the tower, and I got paragon AND renegade points for it!