I love Titans because of their subclasses: one purely offensive and one purely defensive. I feel I can be of most use to my team in any situation with this setup and it makes the game extremely fun for me for that reason. The bubble for defender is SO useful for team-mates in both PvE and PvP (providing cover/blinding/buffs). Hunters have two purely offensive subclasses which is great for PvP but I don’t play PvP that much. Warlocks have two mostly offensive subclasses one of which, of course, benefits from the defensive-ish (and useful) self revive. At the same time, radiance can be activated for a ton of offensive damage. I’d say warlocks still have a ¾ offensive role. I prefer the awesome polar opposite subclass roles that the Titan provides and because it suits my play style I don’t see myself leveling up the two other classes just for the sake of having them.