Definitely the Titan. I would like to take the bullets and damage of a thousand people (over exaggerating of course...or am I?) and dish it right back to them. As a second class though, it would be pretty interesting to be a Hunter. I could see myself sneaking around and jumping on roofs to then snipe at enemies giving people trouble or killing them. The differences that I know between the three classes are: Hunter: The Hunter is pretty much the assassin/ninja in the group. Sniping at individuals in the area, but also could be the retriever. Sneaking around and getting the objective before the fight even starts. Titan: As you guessed the Titan is most likely the tank in the group, taking all the damage and distracting everyone while the others support you or help kill all. Warlock: As far I know, the Warlock gets something called "The Gift of the Traveler". I do not know what it is or what it does or even how it will intend to work. I have heard nothing about how the Warlock fits in but hey, they may turn out to be the strongest class of them all...