Been reading this thread for a while (there are a lot of interesting posts here), and I find my self in need of sharing my thoughts.
Regarding the fact that Alistair is actually "in love" with the Wardens and not the PC; am I the only one who finds this immensly refreshing? Alistair, and all the love interests in DA:O in fact, have lifes and opinions outside the romance. This is a personal pet-peeve of mine, you see; I hate it when a character in a book, movie, game, whatever, is defined entirely by the person they're in love with. Very often, people who want to write something romantic give the character in love absolutely nothing else s/he finds important but the love interest. They have no life, no ambitions, no nothing, outside of this infatuation. I suppose a lot of people find this romantic, in a sense that they are giving up everything for the person they love; personally, I find it disturbing. Love is a strong feeling, yes, but there are other things that are important too; dreams and hopes and ideals and so on. I, for one, would never give up those no matter how much I loved someone.
So, when you cannot make the characters you've romanced do something "just because they love you" that doesn't necissarily mean they *don't* love you. It means they are more than their love for the PC. Alistair is in love with the idea of the Wardens, yes, becuse that's what he has chosen to identify himself with. The thing is, the characters, even after they fall in love with the PC, don't spend every moment occupied with them. And I, for one, am glad that there is no "power of love" moment with either Alistair or Morrigan in the game -- you can't force Alistair to give up his identity for you, you can't force Morrigan to give up her plans/goals/ambitions, just like Leliana leaves you if you decide to stettle down, and Zevran if you don't. Just like no man could force me to, for example, give up my education to get married. It's just not going to happen. I wouldn't be able to live with myself.
I also think that for a character like Alistair to put duty infront of love, whether it's an imagined one to the Wardens or a real one to the throne, feels very true. Wynne says that love is ultimately selfish, which Alistair certainly believes in. And he's been raised to be unselfish, always being told that "there is no place for you to start anything", to an extent that he is self decapitating. I know this syndrom myself; if something doesn't work, it wasn't meant to be; you didn't deserve it. You accept defeat before you've even begun to fight, becuse you don't see it as a defeat, you see it as the way the world works. I do think his love for the PC is real enough though, and more real than the love for the Wardens, which I would classify more as an idealised self image or his base morality. Like Leliana's faith, maybe. If you bring her when you defile the ashes, she turns on you, approval rating no matter. (However, this might be an unfair comparison, since there are way better reasons to spare Loghain than to defile the ashes.) Is Leliana more in love with the Maker than the PC? Oh YES. Morrigan is probaly mostly in love with herself, although it's hard to tell since we know so little about her motivations. Zevran... Zevran is probably the one who most closely follows the classical romance, where you become everything, but that is mostly because he didn't have anything to believe in before you came along. You become his Duncan, sort of?
I actually think that what Alistair needs is Mommy - the kind of uncoditional love and care that doesnt have to be reciprocated. Because I can just see him failing miserably the first time *you* need him."
This however is probably true (which ties in wonderfully to my PC, but that's not the question.) He wants *family*, and tries to make you both his mother, sister and lover. When the *duty* part of his personality hits that, things fall to pieces.
However, I'd like to know when, in your opinion, that the PC needs him for the first time. For my PC, that was probably when they got back to Denerim for the first time to find the Alienage closed. Which, sadly enough, didn't merit a reaction from ANYONE. All I got was a "The Alienage is closed. Please be on your way." I blame this on it being a game and not real life. I'm sure the characters reacted to that, it just wasn't put into the game. Just as I thought Alistair's line "Oh... I forgot about that," in response to the human PC was mostly an attempt to squeeze all origins into one dialoge tree. I got the same odd thing in the city elf origin; when you finally do get into the Alienage, Alistair is shocked to find out the PC was bethrothed. Right... we traveled together for what, 1½ years at the least, are lovers, and you don't know that? I can come up with a thousand reason for my PC not to have told him, but the truth is that she would have. The truth is that to have that conversation in the game itself would have required money and time, and well... it isn't a dating sim. I can fill in the missing conversations myself.
Edit: Oh right. I get it now. You were refering to a future situation, right?

I obviously had a lot to say about this. I hope some of it made sense.