I just came back, too. I feel ya. So much Rakata and Battlemaster gear on my toon.
I've seen some things thrown around in threads about how to gear. And I suppose it depends on what you're talking about. PvP, PvE, leveling?
I'm still leveling, so I'm not thinking too much about it. But if it's anything like how I remember it. It's all about the POWER!
Hopefully, someone is working on a guide for 3.0 for PvE and PvP. I'd like to get back into both. Where are all the theorycrafting number crunching math nerds in 3.0? Hook a brother up...