But you're not supposed to be connected to the character. You're supposed to be the character yourself. But I know what you're saying. And even though you may be able to make a few choices in a Sam Fisher game or any other linear game, the outcome is always the same. The character is who he is, there is no changing that. He's the kind of character that has multiple paragraphs only about his personality on Wikipedia. Whereas Corvo or someone like the Dragonborn wouldn't have this because the character is whoever you want him to be. You can go through the entire game without killing anyone in Dishonored, and suddenly your character is a pacifistic peace keeper, or you can kill every one violently without warning and suddenly he's a maniacally evil psychopath, these are just example. But I see your opinion, I'm sure there plenty of people who can't get into the FPV playstyle, but really there is no going back now. Dishonored will be a FPV only game. You should get it anyway though, it might change your opinion.
No worries mate, I am getting it anyway cause I just love Stealth haha

BTW in Splinter Cell you can also finish the levels without killing anyone being the perfect Ghost, or kill everyone being a ruthless agent, and it is not a linear game at all, it is Sand Box style, I read in a couple of different threads that Dishonored will be the same, it won't be an open world experience, but more linear or level based, something like that.