The only two I see, Hunter and Warlock. I played Hunter for a bit and it makes you wonder why you'd even bother being titan(I have a Titan main). Titan is meant for close range, but that doesn't exactly mean anything in the world of Destiny. Hunters and Warlocks can do just as good in close range without much risk and have more tools at their disposal. Hunter with the golden gun and blade dancer, it kind of just makes many of the things the Titan can do useless. The fucking shield that you have for the defender class becomes absolutely useless because it's either you sit and wait for the Hunters supercharge go away or you go out and try and kill them. If you wait, they'll just rush in with their super and maybe you'll kill them, or they'll just lose their super and rush you with melee and shotgun and kill you. Theoretically, there isn't much difference between the Warlock and Titan class, yet they have much more tools to get the job done in PvP. They both have supers that cause splash damage, except one allows for much more damage to be spread out without risk of truly missing and getting thrown into a group of people who will then melee and shotgun you to death. The Warlock subclass just allows for overall bullshit to happen, and that whole Titan being the tanky class out of the three bullshit goes out of the window. The Warlock can basically revive themself and they get an outrageous shield if they even melee a person with low health. There are many times where I have my defender class shield and a Warlock just comes around to set me on fire with a melee and shotguns me from a distance.. Defender class is just useless. The grenades are given are just a gimp in its own. i know this may sound like me talking ot of frustration, but I'm on the move, if you feel like some things I've said are wrong, just say so!