I'd really of liked to have seen this go more Poly, however I think grey's have went with Callies bisexuality might meet its boundarys, but there is real love there between Callie and Mark.
No, I agree that Arizona isn't happy sharing Callie - but isn't that somewhat close to reality? Its rare that someone is completely happy with sharing - especially if they didn't want to share in the first place but are 'forced' to.
I think its really well done - especially given the stresses they're all under.
Yes, as well with Mark's feelings for Lexi, and Lexi's feelings for both Mark and Avery.
The storyline with Teddy and her "fake" marriage has been interesting, too, but whenever I see Scott Foley, I picture him as Cool Breeze with a rifle in his hand.
Then there's Kerev, the poster child for serial monogamy.