Also, here's the list I've been going off. This is from the Bioware site:
1.) The decision to save either Kaidan or Ashley.
2.) Whether or not the player kills Wrex on Virmire.
3.) Whether or not the player decides to save the Citadel Council at the end of Mass Effect.
4.) The player's choice of love interest.
5.) Whether the player spares or destroys the Rachni Queen at Peak 15.
6.) The player's treatment of Conrad Verner.
7.) Whether or not the player completed the UNC: Asari Diplomacy sidequest.
8.) Whether the player chose to allow the Alliance to conduct experiments on Nirali Bhatia's body.
With reference to no.8, I chose to give the body back to the husband, and stop the alliance tests.
I'm starting over because my file was deleted but this is what I plan on doing.
2. Save Wrex (I hear he becomes leader of the Krogan and therefore not in your party).
3. Save Council
5. Spare Queen
6. Treat him kindly if I can find him again
7. Going to complete it.
8. Gave it back to the husband.
What's the Cerberus sidequest? I believe that the level of your character is reset to 1, unless you saved with level 60 guy. Then you start at level 5 and get other bonuses.