Maybe its just me, but I have never saw the appeal of taking Sten anywhere, he is pretty much like Alistair, ust replace the whining with him just being silent and trying to keep any sort of conversation to a minimum, he ust annoys me, atleast zevran talks, even if he annoys me its more entertaining than sten. So who is your guys least favorite party member ? For me its out of Shale, Sten and Oghren.
I can usually leave Oghren, Sten, and Morrigan behind, once I get Wynne. I can't help myself; I end up playing "paragon" 99% of the time. I got so tired of "Morrigan disapproves" that I usually leave her in camp. As far as Oghren and Sten go, I don't like the way the two handed fighting goes. Just my perception, but while you do a lot of damage if you hit, it seems that you are mostly swinging at the space where your enemy used to be, five minutes ago when you started your swing. When I leave Sten and Oghren to defend the gate in the final battle, I seriously doubt either one of them managed to hit more than one or two of the running darkspawn. Even Shale moves better than that. It improves if Shale can use her "crowd control" to hold the darkspawn and give Sten and Oghren stationary targets. Zevran isn't a favorite either; I do get that he's an assassin, not a rogue, so stop offering to open locked containers for me, okay? You can't do it, so don't offer. I like Leliana much better for the rogue role, even though that seems to be my favorite class so far.
I really avoid Oghren in Awakening. They changed the conversation system, and because I tend to forget to hit my tab key every .5 seconds I miss the conversation triggers. I have yet to figure out how to do his quest. Most of the others aren't that hard to start, but I keep running out of patience before I get Oghren's. There were other annoying things for me in Awakening, but it did have a decent story for the most part. I tend to replay games, and I'm still playing both Origins and Awakening, so for me it was worth the cost.