I basically picked Titan just because I'm used to playing the tank/support role in most of the MMO games I came from. I like to be effective in terms of being able to deal out my own damage, but also love helping out the team as much as possible. I love my defender because I can crap out tons of orbs for the other team which leads to more supers which leads to more death of the enemy and more orbs for me to eat so I can crap out more orbs of my own. Ran Omnigul the other night with a really good Warlock and Hunter, I think by the end screen we all had over 50 orbs a piece picked up and stuff was just dying left and right. It really is amazing when you have all 3 classes working together or really any class working together with a defender titan focused on orb generation. Defender is really a great class, my roommate has Saint-14 on his and parks his bubbles on the doors in some of the strikes so when the majors come rolling out they are instantly blinded and become cannon fodder for him and his teammates. I really want to pick up that helm so I can make the bubble even more versatile besides just providing more DPS.