I guess in all the cases I've followed (and there have been a lot over the years), I've never before seen interest in the thoughts and feelings of the killer. Interest in the cases, yes. Interest in the various players in the case, yes. Interest in the family and the victim(s), yes. Interest in the circus surrounding the big cases, yes.
But this is the first time I've seen such intense focus on the killer, specifically wondering what she's feeling, thinking, how she perceives things, what her opinion might be, and I find that an interesting phenomenon from a sociological standpoint. There's also energy on waiting or hoping the killer will feel something specific (as defined by whoever is wishing it), will feel remorse, will see her own circumstances in the way that her spectators want her to see them. Usually the killer is just seen sort of as a blob -- a monster who did something evil and took one or more lives -- and what the killer thinks or what their opinion might be is not considered much, if at all. This changes somewhat if the killer is someone who was famous before their criminal case.
To me, as someone who looks at & studies sociological aspects to criminal cases, this is an indication of how important Arias really is to a base of case followers and it's an indication she (an otherwise fairly uninteresting killer) has managed to capture a high level of attention and get under people's skin who have never met her and never will. It's something new and different, and it's interesting to work out if it's the killer who is somehow different or something else entirely.
This is it's own circus within the larger circus and it's a subject I find interesting. I question it because I'm trying to understand what's underneath it, as it's an area of study I'm pursuing.