I just beat Dragon Age this weekend. I think I clocked in around 40 hours, maybe a little less. The game was all right, though I uninstalled it this weekend and can't forsee myself ever playing it again. The story and the characters just weren't very interesting (outside of a handful, such as Alistair and Morrigan), the game is extremely linear, the DLC is a rip-off and the game is severely unbalanced in favor of mages. I would give it about a 6/10...I mostly enjoyed myself, but it was nothing special, and I really found myself growing impatient towards the end. Basically, every fight fell into one of two variations: the enemy has a mage or two, or the enemy has no mages. Fight #1 was a roll-of-the dice: if their spells hit first and you failed your rolls, it was probably a reload. Fight #2 was always a walk in the park.
Minor spoilers:
Also, towards the end, when two characters left my party, they took all of their gear with them! Gee, thanks for taking my Superior Dragonbone Armor and Tier 7 weapon filled with Master Runes with you! :\