Paragon Shepard resists the call of Miranda Lawson's ass since he's in a hot monogamous relationship with Liara T'Soni. Soldier seemed like the best starting class in ME1 so I just rolled my character over for all three games. Garrus never left my party because he's a total bro for life. Other partner was usually Mordin Solus or Legion...you get Legion too damn late in the game though. I had fun with the loyalty missions in ME2; Thane's was probably the best of the bunch.

Also TO AVOID SPOILERS! Later on in the game you'll be given the chance to select one of three weapons. The Sniper Rifle's the strongest of the three. Highly recommended you pick that one over the shotgun and assault rifle.