Tanking is my favorite role but I main dps. My guild is small and we have 4 players that want to tank. Unfortunately for me I'm good at both roles and better at dps than the other players.
I considered finding a new guild where I could tank but let's be honest, half of this tier is done with 1 tank on story mode and the guilds that are progressing in hard mode already have 2 tanks. So, for me, it feels like I have to play dps if I want to progress.
And I'd settle for pugging except my experience, at least on Rep side Jedi Covenant, is that the typical pug dps is awful. For example, I queued for a random hmfp Saturday night and got Blood Hunt. I got a pretty good sage healer, a TK Sage, and a commando trying to (and failing) play assault. 50% at enrage and 4 adds up. Obviously, this is well after the nerf. It's ludicrous. And this is only my most recent pug experience but I'm sure everyone reading this has had something similar.
From my perspective, if you want me tanking in pug groups, the player base needs to step their game up.