Good poll.
It's hard to answer this, but I can be clear about it.
There are some ships which roots lay very far in the show, that it would be essential that the writers should put them together. For me, these are Grissom/Sara, Catherine/Warrick, Horatio/Yelina and Danny/Lindsay. I feel very highly about that. But there are also some ships that I really love, but that I could accept it if they would never be persued. Some of these are Sara/Greg, Calleigh/Speedle, Nick/Sofia, Horatio/Suzie. I do charise these a lot though.
I must say that a ship being canon is not that big as it might look. Don't get me wrong; I was so hyped about Grissom and Sara getting together, and I still am. But now I feel dissapointed that Sara might never have a chance with Greg. It's like I am never satisfied, and I think a lot of other people will never be as well.