I have 3 Shepards on 360 and 2 on PC.
360
Todd Sheapard 1: paragon, infiltrator, no romance in ME1 or 2, Kaiden lived, lost Thane, Jack, Legion, Tali, Garrus, and Miranda during the suicide mission. He is a nice guy who enjoys talking to his crew and helping them out when they need it. Rarly ever does renage action because he prefers to be the good guy.
Vi Shepard: renegade, solider, romance with Kaiden in ME1 and Garrus in ME2, Ashley lived. Some may consider her mean but she is just very tough and doesn't put up with crap, especially when they are working. She can show her femenine side at times such as when flirting with Garuss and is willing to help her sqaud out if they need it.
Todd Shepard 2: I re played his story in ME2 but this time made sure everyone survived and had a romance with Miranda.
PC
Laura Shepard, (my canon Shepard), pargon, soldier, Romanced Kaiden in ME1 and Garrus in ME2., Kaiden lived. Very nice women who loves to do good. She not only helps her team mates when they need it but she enjoys talking to them to see how they are doing. She also will go out of her way to talk to the other crew members such as the chef and doctor to see how they are doing and if they need anything. She will however though do renegade actions at times if someone makes her really made or they are just asking for it.
Damian Sheaprd, renegade, solider, no Romance in ME1 and currently Im playing his campaign now and I havent gotten to any romance parts but I think I will go with Jack, Ashley lived. He is not the nicest of people. Does not talk to his team to see how they are doing because they are there to do a job and nothing more. He is nice to his team but in the sense of it is showing them respect so they will follow him. He does not help them out if they have a problem and is only interested in doing what his superior officers tell him. This play through is taking longer since its bothering me to play as him lol.