Oh yes, Dragon Age. I am pretty sure they introduced that weapon-on-the-back style out of necessary (easier to program). Now people build questionable scabbards to justify it.
Amazing. They do have my respect though, it requires persistence and creativity.
I don't recall where I first saw it; I thought it was Oblivion but mine was so heavily modded it's anyone's guess. It soon had actual scabbards, anyway.
My biggest gripe tends to be impractical sword designs that would be incredibly fragile and tend to have loads of pointy bat-wings and dragon-claws that would probably cause more injury to the person wielding it. That and the perplexing belief that swords weight "literally 40 pounds". No, they don't: that's not only completely unusable but physically impossible.