User blog comment:Dragonzzilla/Is It Possible to be a Renegade but Still be Good at the Same Time?/@comment-774818-20110726205428

Short answer: Yes.

Long answer: Yes. Wrex has a mission in ME that if you do it, you're never really presented the option to off him. Alternatively, with enough charm or intimidate points, you can still not kill him. With saving the council, it's just a dialogue option, no charm/intimidate needed. You just click on the right option and *poof!* council saved. You get a slightly different ending scene.

Of all the decisions that give you Paragon or Renegade points, those are only a couple. There are a ton out there.