I just recounted to make sure I have accurate results (I didn't but I do now; oddly enough, at least one post seems to have disappeared completely somewhere? I searched thoroughly but it's totally gone,) and didn't count my own list (which I posted in the GameFAQs thread), since I've thought of way more characters I want since then. I'm posting the new list here, so that I don't lose it if I do another recount, so that I have a chronological order for it all, and because I just feel better about having my own votes publicized. This is also by far the biggest list, at 266 characters, so if anyone feels they are forgetting someone, they may very well be on this list. For your viewing pleasure, enjoy a complete (to my recollection) list of characters who I'd be all sorts of chuffed about seeing as a playable character in Super Smash Bros.
-Veterans-
Ivysaur, Pokémon Trainer, Squirtle, Pichu, Snake, Ice Climbers, Wolf O'Donnell
-Mario series-
Paper Mario, Captain Toad, Toad, Geno, King Boo, Daisy, Fawful, Birdo, E. Gadd, Cackletta, Toadsworth, Hammer Bros., Koopa Troopa, Goombella, Popple, Prince Peasley
-Yoshi series-
Kamek, Shy Guy, Baby Bros., Baby Mario, Yoshi & Babies, Yoshi & Baby Mario
-Wario series-
Waluigi, Captain Syrup, Mona, Jimmy T., 9-Volt, Wario Land Wario
-Donkey Kong series-
Dixie Kong, Dixie & Kiddy Kongs, Cranky Kong, Lanky Kong, Donkey Kong Jr., Pauline
-Legend of Zelda series-
Impa, Skull Kid, Vaati, Midna, Ravio, Masked Link, Tetra, Tingle, Toon Zelda, Ganon, Darunia, Ruto, Twinrova, Koume & Kotake, Dark Link, Malon on Epona, Deku Link, Goron Link, Zora Link, Kafei, Irene, Medli, Beedle, Epona
-Metroid series-
Ridley, Dark Samus, SA-X, Fusion Suit Samus, MB, The Baby
-Kid Icarus series-
Viridi, Fighter, Eggplant Wizard
-Kirby series-
Bandana Dee, Prince Fluff, Dark Matter, Gooey, Galacta Knight, Rick, Animal Friends
-Star Fox series-
Slippy Toad, Peppy Hare, Leon Powalski
-Pokémon series-
Bulbasaur, Venusaur, Blastoise, Meowth, Mew, Eevee, Farfetch'd, Snorlax, Totodile, Bayleef, Pichu Bros., Heracross, Togepi, Elekid, Tyrogue, Sudowoodo, Sableye, Metang, Grovyle, Sceptile, Blaziken, Gardevoir, Plusle & Minun, Deoxys, Piplup, Weavile, Serperior, Oshawott, Dewott, Victini, Hawlucha, Sylveon, Goodra, Pangoro, Michael, Professor Oak, Blue, N, May, Pokemon Ranger, Emolga
-Fire Emblem series-
Lyn, Anna, Hector, Caeda, Lissa, Chrom & Lissa, Tiki, Kamui, Aqua
-Mother series-
Masked Man, Porky, Kumatora, Giygas
-Animal Crossing series-
Isabelle, K.K. Slider, Tom Nook, Tortimer
-Pikmin series-
Louie, Alph, Brittay, Charlie, Drake Crew, Plasm Wraith
-Punch-Out!! series-
Doc Louis
-Super Smash Bros. series-
Primid, Sandbag
-Sonic the Hedgehog series-
Tails, Knuckles, Espio, Emerl
-Mega Man series-
Zero, Bass
-Retro franchises-
Daitoryo (Hanafuda), Color TV-Game (Color TV-Game 15), Bubbles (Clu Clu Land), Balloon Fighter (Balloon Fight), Mach Rider (Mach Rider), Diskun (Famicom Disk System), Ayumi Tachibana (Famicom Detective Club), Goku (Yuyuki), Lolo (Eggerland/Adventures of Lolo), Alice (Balloon Kid), Prince of Sable (Kaeru no Tame ni Kane wa Naru), Sukapon (Joy Mecha Fight), Pulseman (Pulseman), Harry (Teleroboxer), Lip (Panel de Pon), Muddy Mole (Mole Mania), Hakkun (Sutte Hakkun), Chiritorie (Chiritorie), Mini-Kangaroo (Nintendo Mini-Games), N64 Logo (N64), Satebou & Parabou (Satellaview), Mr. You! (Sky Skipper), Nester (Nintendo Power), BS-X Avatar (Satellaview), The Amazon (Pro Wrestling), Fat Hockey Player (Ice Hockey), Horse (EVR Race), Goldwyn (Uniracers)
-Modern franchises-
Nintendouji (Nintendouji), Ray (Custom Robo), Alexandra Roivas (Eternal Darkness), Starfy (Legend of Starfy), Barbara the Bat (Jam with the Band!), Chibi-Robo (Chibi-Robo), Dr. Lobe (Big Brain Academy), Nintendog (Nintendogs), Robopup (Nintendogs), Elite Beat Agents (Elite Beat Agents), Captain Rainbow (Captain Rainbow), Nanocarp (Electroplankton), Mallo (Pushmo), Mr. AR (Augmented Reality Games), Dillon (Dillon's Rolling Western), Monita (Nintendo Land), Tempo (HarmoKnight), Fossil Fighter (Fossil Fighters), Lark (Pilotwings), Henry (Code Name STEAM), Hiro (Trade & Battle: Card Hero), Savvy Stylist (Style Savvy), Wandering Hero (Find Mii), Wii Fit Balance Board (Wii Fit), Reckless Silhouette (Wii Strap Screen), More Mii Fighters, Hero (Kurikin Nano Island Story), Demille (Tomato Adventure), Eddie (Fluidity), Cubivore (Cubivore), M-09 (Project HAMMER)
-Magical Starsign series-
Hero, Mokka, Lassi
-Rhythm Heaven series-
Chorus Kids, Marshal, Rhythm Girl, Rhythm Monkey, Fever Kids
-Wars series-
Orange Star Team, Andy, Sami, Nell, Olaf, Infantry
-Golden Sun series-
Isaac, Jenna, Alex, Matthew, Sveta, Karis
-1080/Wave Race series-
Ricky Winterborn, Akari Hayami, Kensuke Kimachi, Ryota Hayami, Frosty Winterball
-Splatoon series-
Inkling, Octoling, Callie, Marie
-Third Party franchises-
Banjo-Kazooie (Banjo-Kazooie), Arle Nadja (Puyo Puyo/Madou Monogatari), Jack Frost (Shin Megami Tensei), Toejam & Earl (Toejam & Earl), Bayonetta (Bayonetta), Klonoa (Klonoa), Taizo Hori (Dig-Dug), Agumon (Digimon), Nightmare (Soul Calibur), Phoenix Wright (Ace Attorney), Simon Belmont (Castlevania), Sparkster (Rocket Knight), Vic Viper (Gradius), Bomberman (Bomberman), Slime (Dragon Quest), Moogle (Final Fantasy), Cooking Mama (Cooking Mama), Slime & Chocobo (Dragon Quest & Final Fantasy), Bub (Bubble Bobble), Bub & Bob (Bubble Bobble), Black Mage (Final Fantasy), Sophia the Third (Blaster Master), Professor Layton (Professor Layton), Maxwell (Scribblenauts), Ryu Hayabusa (Ninja Gaiden), Earthworm Jim (Earthworm Jim), Quote (Cave Story), Shovel Knight (Shovel Knight), Chell (P0rtal), Tetrominos (Tetris), Monokuma (Danganronpa), Ninjabread Man (Ninjabread Man), Toku & Enril (LostWinds), Pocky & Rocky (Pocky & Rocky), Rin Tezuka (Katawa Shoujo), Yooka & Laylee