Allow me to back up what TAD said. I don't see how May has ever been a more emotional character than Misty, actually I see it as the other way around. What have we seen of May so far? Nothing that you wouldn?t see in an everyday sweetly-exuberant ten-year-old: unbridled positivity and girly-sweetness. What emotions do you say May has felt? Misty has felt them too, and so many more. If May can have all those in one season, Misty has certainly had those emotions and emotions much deeper in five seasons on the show. Let?s make a list...
Compassion: If she didn?t have compassion, she would have sent Togepi on its merry way after hatching. She has more compassion than anyone else on the show; didn?t she always have a kind word for Ash when he lost his battles? Her caring touch was unparalleled.
Insecurity: Anyone who examines Misty at all knows that she is very insecure and covers it up with her rough demeanor. Besides, all people have insecurities, she is just good at hiding them. There was never a need for her to be insecure in the show, on the other hand May can?t do anything on her own and needs everyone?s support constantly. Her lack of confidence is amazing.
Enthusiasm: Err...training for the Whirl Cup ring a bell?
Fear: Remember when the chandelier in Pokemon Tower that fell on Ash? She was horrified and thought he was dead.
Anger: She gets angry a lot. How could you say that Misty never experiences Anger when it?s her most apparent and common emotion besides general happiness?
Shame: Misty has nothing to be shameful about, but she does feel it after losing a battle.
Awe: Remember the expression on her face when she watched Togepi hatch? That was beautiful.
And those are all single examples. Misty matches and exceeds May in every category; especially emotion. There?s no way May can be more vibrant than Misty in less than one year, and I honestly don?t see how so many people have jumped ship and sided with the newcomer instantly, I could never do that, especially with someone as bland as May. If they would have put a little more thought into the character, I could more easily accept her, but she?s nothing, a blank slate, the pinnacle of orthodox pokemon training, except sub-par in everything she does. At least Misty could win battles or put up a good fight in the ones she lost, May sends out her tiny little Torchic expecting it to burn the opponent to a crisp, it gets taken out immediately (save for battles with TR, they HAVE to lose, no matter who they?re up against) and then she weeps over the loss. I haven?t watched her in any contest battles and don?t care to, I expect that they?ll take a similar route as her regular battles.
Back onto the subject of Misty?s emotion versus May?s emotion, though. I don?t see how it makes a difference how much they display their emotion. May wears her heart on her sleeve. Misty is more complex than that, always having to hide her feelings to keep up her tough tomboy fa?ade. May has no restraint, and on top of it any emotion she does show is usually grinning, grinning, and more grinning, and I tire of it very quickly. Misty?s passions and insecurites were apparent as quickly as May?s were; she let Ash know almost right away that she aspired to be a master of water pokemon. Of course that wasn?t her only passion, might I add. She was so much more than just training pokemon. Her companionship to Ash and her devotion to his causes made her put hers aside and help him on his path to victory, and her bond with Ash was forged at the very beginning of both of their journies, and that?s something May can never overcome. The only time I ever saw Ash display something close to despair was during Gotta Catch Ya Later; they spoke very openly of their friendship with each other and how incredibly valuable their friendship was with each other. May can only be a friend to Ash in the context of their love for pokemon. Misty is Ash?s friend for life. Definitely Misty had more of an effect on Ash than May ever will, and that makes her so incredibly important to the show and to the other characters. Ash, Misty, and Brock made a trio of amazing trainers with complex personalities and the stories were more involved then, interpersonal relationships were more pronounced when Misty was on there (up until Johto, but let?s not get into that.) Right now with May, it just feels like two guys, a girl, and their pokemon. There?s nothing between the lines to read in AG. Misty gave the show depth. May is a drone, made to sell to video games, a slap in the face to people who have been with pokemon from the beginning like me.