Now, Obsidian is great, I'm glad we all agree on that. But Bethesda and Bioware also do good things and I think it's time we put our hate aside and see the positive in those two developpers who just don't get enough love around here. I'm not saying we start treating every good thing they do as God's gift to gaming, but still...
Here, I'll start.
I like Bioware's voice actors. They're always pretty good, especially Jennifer Hale, and I like Carth/Kaidan's voice actor (mostly because he also played Scorch in Republic Commando.)
Bethesda makes some big open worlds that have some nice places to explore. Like Megaton. That was nice. Point Lookout's trippy mushroom scene was nice too.
Oblivion and Mass Effect were pretty.
Mass Effect's ending was very epic and enjoyable.