AggroGamer: "After the original Mass Effect, Bioware had a tough job on their hands. They made an excellent game, but one that was hampered by complaints from the players. So during the two plus years since the original, Bioware has spent their time making the necessary changes. The final result is leaps and bounds ahead of the first.
Before you start off on your next adventure with Commander Shepard, you must first decide if you want to start from scratch or import a save file from the first game. The way the game imports files is very advanced. Every time you played through and beat the original game, it lets you select between any of them. It then gives you a brief review of your choices and stats from the original. If you start from scratch, the game assumes you let Wrex die and you did not save the council."