A_M_Swallow
Regular
Yea, that's been my suspicion all along, until the flirting made it just plain wrong. Then, of course, Romana was a close second, but, I think she's gone past believability as well.They've so heavily pushed the River-is-the-Doctor's-wife position so much in the season that I have a lot of trouble believing that they're going to actually have it be that. I was hoping for River being his daughter, but she's flirted with him so much that if that were so, it would be a lot weird. So, other than that, I have no solid ideas. But I do enjoy River a lot though; she's fun.
I'm liking the Valleyard theories for the Big Bad controlling the Dr and his destiny, and I even wondered about River helping the Valleyard to the detriment of the younger 3 (DT, MS, and Matt's successor). I'm not convinced the Dream Lord is not someone we know in disguise.
And yes, River is awesome. When we first met her in the library, I thought she was kind of a bummer for a future companion to look forward to, but, every appearance makes her grow in awesomeness as a character
Due to a BBC webpage published today I think River Song is an alien.
Spoiler for suspicion about River Song:
The BBC's Doctor Who webpages have added a new set of aliens to the list the Drahvins.
http://www.bbc.co.uk/doctorwho/dw/news/bulletin_100922_01/Invasion_Week_Day_Three
They are described as
"The Drahvins were last seen in 1965, with one newspaper branding them 'the ray-gun blondes'. Although he didn't encounter any male Drahvins, the Doctor discovered that a small number existed, although their levels were kept in check so the men folk would not deplete supplies such as food! When it comes to Drahvins, the female of the species is more deadly than the male..."
It is odd for a set of monsters to be given a webpage when we have not seen them - unless we have seen them.
River Song is a mysterious female who can be quite ruthless - she made the Dalek beg for mercy and then killed it. She flirts with every man she meets and admits to killing a good man. That sounds like the proverbial spider woman who kills her mate. Since they have made her origins mysterious I therefore suspect that River Song is a Drahvin.
The other female that does not fit is Amy Pond. Her parents are (were) dead, she grew up in a big house which was haunted by Prisoner Zero. The Doctor said that she did not fit and was very surprised when Amy did not know who the Daleks were. She has lived most of her life in an English village but speaks with a Scottish accent. Amy also has a strong desire to kiss the Doctor and where she has tried it is obviously a lead into sex. The Doctor has had to actively hold her off several times. That feels like another spider woman. My suspicion is that Amy is a Drahvin trap sent to kill the Doctor.
Although since young Amy can touch grown up Amy without giving off radiation she may be a Time Lord creation. Having in prisoned them the Doctor must have made a lot of enemies amongst his fellow Time Lords.
Amy and River could be the same woman but my gut says there are not. However I do think that both females are Drahvin.