I have a great many favorite RPGs....I'm an equal opportunity role-player.

Heartily agree that Planescape: Torment is one of the all-time greats (love love love Annah and her spunk). Then again, I loved almost every Infinity Engine game that was made....although I never had a chance to play BG1. Enjoyed the first NWN, but not as much as some. Morrowind still tops my list for the "open world" style RPG's--the first RPG I ever played on a console, and I still judge all the others against it for depth and freedom of play.
I can enjoy JRPGs when I'm in the right mood. Never played FF7 (have never owned a Sony console), but I did enjoy the heck out of FF12 a while back. Not because it was the greatest game ever, but because it was pretty and moving through the game gave me a feeling of achievement at each new milestone. Once things start to get grindy....I lose interest pretty quick. Which is why, even though I own Lost Odyssey, it sits unfinished and collecting dust on my DVD shelf. Well, that and the fact that they kept forcing you to split up your party in weird ways.
More recently, Oblivion was nice, but didn't absorb me utterly the way Morrowind still can. Mass Effect is, bar none, the most cinematic game of ANY kind that I've ever played. While it may not offer the same kind of freedom that an Elder Scrolls game does, it truly makes me FEEL while I'm playing it. I dare anyone with emotions to NOT be affected by the opening cinematic/reveal, or the ending. I swear, my heart POUNDS as I fight my way up the outside of the Citadel Spire to take on Saren, and the ending cinematic brings a tear to my eye every time. It's like living inside a REALLY GOOD action/adventure movie (*cough* newStarTrek! *cough*).
All that being said.....I have extremely high hopes for DA:O. At absolute worst, it seems likely to be a fun and engaging experience along the lines of NWN1. At best, it could be as awesome and emotional an experience as Planescape: Torment, coupled with the incredible immersion and cinematic elements of Mass Effect. I'm hoping for the latter.....we'll find out in two and a half weeks!