All of this!
Watching Ragnar circling Lagertha was such a simple but seductive act! They still love and admire each other so I can see them sneaking off into the bushes at some point.
TF's eyes had me at the first scene with him. Can't believe he used to be a simple underwear model. Oh wait...watching him slid into the bath with Linus Roache was pretty hot too.
I wouldn't be surprised if Rollo doesn't kill Siggy at some point. She is playing too many people against each other and no one likes a rat for long.
Floki is the dangerous one. He feels forgotten in the crowd around Ragnar and is very jealous of his affection for Athelstan. Plus he comes across as being a bit mentally unstable so he could explode.
According to the site I found about the blood eagle, this was a tortured reserved for special occasions, such as payment for killing someone's father. Seems that at some point later in time,one of Ragnar's sons captures Aelle and kills him via this torture.
I'll add my praise for Roma. I love history in general and yet I devour historical fiction. Even when I know the actual facts, the veering from truth doesn't bother me if it's done well and seems plausible.