lol, i'm glad this thread exists....I was just playing mass effect 3, which is a great game, but suddenly had a massive urge to play DAO which is installing as we speak (i felt the need to google 'dragon age origins best game ever' whilst it does that). Its definetely my favourite game of all time..Deus ex comes close, but i've never played a game with such well written characters. The story might be a bit cliche, but its the best storytelling in a game i've ever played.
It was also my first 'real' rpg, and once i got the hang of it the combat blew me away...it took me a while to get to grips with how complex the game is, but once i did i got completely lost in the game mechanics, having the head outside for a smoke to properley think through every skill/attribute/talent point
DA2 combat was more responsive and easier on the eye, but i wish they had left in the block/miss animations/mechanics....i loved watching my dex based rogue slowly transforming throughout the game into a tank as he became the duelist who was never there when the opponent struck, and who always landed his blows...awesome game