Okay so I just started watching FMA03 after finishing brotherhood, and while the plot line is one of the most clearest differences between the two, the characterisation is another distinct one. Namely that of Ed's characterisation. Don't get me wrong, he's still short, short-tempered about his shortness, and devious as hell. However, FMA03 really does emphasise how much of a kid he is, and with that comes a more....hmmmm...quieter charm to him? He is much more approachable and earnest to please than the other Ed, and one of the best results of this is his relationships with others. In Brotherhood, people remarked how his determination and loyalty earned him their respect, despite his shitty attitude. He also showed no interest in anyone but Winry, and no one showed interest in him bar her. Edwin will always be one of the best romances ever written, but it still is slightly unrealistic that not a single person Ed met his age didn't at least get a little crush on him. May doesn't count as when she actually met him she was severely unimpressed, but aside from her no one showed interest in this absolute golden beauty. That's when you jump to 03 and get your absolute fix of a wild range of teens meeting him and basically low key falling in love. Clause (who I firmly headcannon as gender fluid or non-binary, rather than brushed over as a cross dressing girl for no apparent reason??) is enraptured after she gets to know him, Rose is amazed by his bravery and perseverance, and Russell literally writes him the gayest note declaring he admires Ed. Basically, what I'm getting at is FMA03 gives us Ed the golden bisexual icon we all need. Amen.