Probably because I only started this summer. ^-^ Robin is a Who fan and we've had it in the queue forever so I finally decided to watch it. Now the kids and I are completely hooked. I really love River and I enjoy River/Eleven a lot. I think if I was to personally snatch up a character to keep forever, I'd have Rory.
I went to Geek Girl con and they actually talk about river and I think what they said was pretty accurate. River had a lot of potential, but Moffat should have had the stuff with her last 2 seasons instead of 1 and he should have done more showing and less telling the audience how to feel about her. Also at the end where it's stated that she just sits around in jail until The doctor shows up... that kind of irritated a lot of people because it made her more this girl who stands around waiting for the doctor instead of the badass we were introduced to who went out and had adventures of her own.
Personally I'm not a big fan of the doctor and romances, I prefer him not ending up with them. The doctor in the early doctor who series was well more asexual. I also like what they said at panel I went to about how the companions used to go on to have their own lives and learn to be their own people. It's kind of cool that they weren't mooning over the doctor. Their adventures were this cool part of their life, but they weren't broken by it which almost all of the companions are now.
Personally I don't hate River, I just... wish they had done a few things differently so that she could be the independent badass that we were introduced to.