I was fairly surprised at how much time I spent playing DKS from start of ED to end of FoV. Yeah, I just kept finding more and more and more to do. I'm very happy in the way they moved all the armor sets for ED as compared to where they were originally located. As much as I'd love to be able to hop right into a flying fortress and get everything in one fell swoop, it was a whole lot more rewarding to get them all after being forced into checking many dungeons instead (as a side note: omg, thank you to those that posted locations for the items I couldn't find on my own in the DKS armor set thread!).
I like to play DKS if I want a fairly non-serious RPG experience. Not to say I didn't enjoy the story (I did), but it was somewhat refreshing to see how the game didn't take itself too incredibly seriously. Dragon Age, to me, is still one of my very favorite games, but for entirely different reasons. You'll never end up feeling too incredibly overpowered in DA as compared to how I felt by the time ED was over (and especially by the time I had my full set of armor in FoV). DA certainly has a more strong sense of dread about it. You won't run into a bunch of Power Rangers in DA lol, though that was absolutely hilarious and I'd never want it removed from DKS.