Just got 30, light-side jugg.
Haven't tanked or pvp'd a ton, but my issue comes more from PvP, I either have horrible frame-rate or else the PvP is lagged out for me.
I just recently got #2 on the dps for a pug match, normally I'm very middle-low end, 5-7. I figure once I'm higher level and the game has been out it'll even out more.
Tanking is fun, I do have issues sometimes holding threat, but very rarely.