Second, there are some who like River Song and some who don't. If I had to pick, I'd be in the second category. And I will tell you why.
It isn't that I don't like her because she's the Doctor's future wife. (Although that does bug me just a little bit because I haven't gotten used to the idea.) It's that I don't like her. I don't like her attitude, I don't like her personality. I don't like how she makes the Doctor look like a bewildered schoolboy suddenly stripped of any authority he had. Sure, she admires him openly to others. Sure, she takes actions to help him, to keep him alive, to save his friends, etc. But she seems arrogant, and smug. It's almost as if she were created as Time Lord 2.0 designed to show the Doctor up.
When River came along in the fifth season, I found her origins very interesting. I even loved the idea that a woman with those abilities who'd time-hopped to find him, to help him, was going to eventually be by his side, someone for him to love and get to keep for awhile. He's always losing people that I thought it was a nice touch. It seemed like the writers understood fan sympathy for the Doctor and that they wanted him to be happy.
I'm not from the "She can't have him because I want him!" camp either. I liked the idea of the Doctor finally having someone of his own. But... not her. The way they wrote this lady gets under my skin every episode she's in. I keep thinking I might've seen her somewhere else and established a dislike for her before she was ever in Doctor Who. (possibly ER)
I especially dislike her with the latest Doctor Matt Smith. She fit better with the David Tennant incarnation of the Doctor - although she stumbled him too. Some actors have chemistry and some don't. River and the 11th Doctor feel off to me. He has more chemistry with Amy Pond than he does with his own wife. And because of the age difference between the actors - or maybe it's the boyish nature the current Doctor conveys - she always comes across as more a mother figure than an equal to the Doctor, in my opinion. So, paired with an almost innocent, wide-eyed, (and slightly bumbling) Matt Smith, it gives the impression of cougar and prey. When they kiss I find myself cringing, and I've never cringed over any Doctor Who smooches before.
The concept of the Doctor's wife feels like it was fed to us in hopes we'd eventually accept it, because we have no choice. It seems like the dreamchild of someone's fanfiction that somehow made it on television. We had time to get to know and grow to like all the other Doctor's companions, but suddenly there she is, thrust upon us, and wearing her relationship to the Doctor like a button on her chest. (of course, he's just as confused about all this as we are.)
I'd have a much easier time accepting it if it wasn't for River herself. A different actress would make it a lot more palatable for me. I'd enjoy the show a lot better then, and not keep wanting to boot her into the black hole from "The Impossible Planet".
And that's the end of my River Song rant. This blog will resume it's regularly scheduled writing and Nano-related program.