Hm, let's see if I can articulate the reason for why I prefer a romance-free show (and in particular, an asexual Ed).
Ed . . . is focused on finding the Philosopher's Stone for his brother. Being the type of person he is, he comes off (to me, at least; remember, this is just my character interpretation) as the type of person to push aside his own personal interests to help his brother regain his body, because that's his
sin to wipe away, and with his intense focus on finding the stone (aka his one-track mind), I'd think it'd be in character for him to not even notice girls (or guys) in a romantic light. And even if he does, then I don't think he'd take the liberty of going out and pursuing something for himself when his brother's still trapped in armor, because that's time he could've been, say, in the library searching for more leads on the Stone. In fact, even if he's being hormonal and noticing girls for the first time, I get the feeling that he'd just ignore the feelings all the same.
Does that make sense? Probably not. But this is one of the reasons why I like the first anime series' portrayal of Ed more than his manga portrayal. (The other reason hits upon the innocent vs. cunning/sly leanings of the character).
Plus, I'm a sucker for platonic relationships (brotherly devotion ftw), because they tend to feel deeper. This may just be me being completely irritated with the gratuitous romance that's seeping into all the movies I watch and/or books I read, though. Nevertheless, romance has to be handled correctly, or it will
come off as shallow and "trite", as Edward Cardinal Elric said - and I clearly don't have much faith in the establishment to pull it off correctly. Haha. Better to be safe than sorry.
Now, I'm not saying that they can't
pull it off correctly. They can. Just . . . eh. Difficult. (And please, don't make it the focus of the show. Gah.)
Annnndddd on another note: I'm totally a Roy/Kimbley fan. I mean, usually I prefer gen, but maaaan - interesting character dynamics and, well, (let's not ignore the shallow aspect of this) they're both hot. Heh.