Honestly the Titan is the worst for PVP. I used to only have a Titan and then once I got my Hunter my K/D blew up. Everyone thinks shoulder charge is OP when its not, 90% of the time you'll get shotgunned before you can actually do it. There's a reason why in the top 100 K/D's only 17 of them are Titans. Titans are good for PVE not so much for PVP but they're still really fun to use.