Hunter for me, but I did try all classes in the beta and they were all great. They just differ and your play style with each differs due to the classes strengths and weaknesses. With a titan you can get right up in the face of enemies and take more of a beating than other classes, you can destroy a group up close with their super and the 2nd super gives a shield which in turn could change your play style also. You could become more group orientated and shield others etc. Look at the level 29 titan on ign, it looks like a beast ;) I would welcome a good titan in my group any time and especially with that awesome looking shield they get.