Then the choice for you is clear, my friend. Be a Trooper. Serve the Republic, help Jedi, kill Sith.
You will find yourself with a lot of "bad" choices with the Imperial Agent, and if that will hinder your gaming experience, I advise you to not go with the IA.
If you look beyond that, however, you'll find yourself with a good storyline, a solid class, and be entertain. I started as a Smuggler, and since all of my friends are Sith, I changed sides and have not looked back since.