I hope enough people are interested in trying this out. Starting with Mass Effect 1, the main things I can think of would be 1. Choose my companions 2. Decisions for planets (save or kill rachni, that sort of thing) 3. Romance if you care that much for it. That's off the top of my head. The only thing I'm deciding is that my character is female, and I'm letting the original council live. Beyond that, the choice is yours. Feel free to go through all 3 games and pick out choices, just know that it may take me time to get there.