Wow, welcome back!

I have long lists, I don't think I can cover everyone, but I'll name a few.

People who left and are currently gone:
Indraugnir, lvl100MewTwo (and his many names), Ultima_Mew, Squirtle_Flame, ASHarris, Eevee Trainer Brad, Sad Angel, Angel Growlithe/Rambunctious Growlithe/Rambunctious Jamirus, Riachu64, PlatinumHawke, Jay (banned, but he used to be a nice guy in the past), SingingJigglypuff, Meowth_Kitten, Espeon12...

People who left but are still somewhat accessible:
The king of penguins/Aipom of Doom, Bugsy/Kirei, Neoleonightz, BoltStryke, Avian Freeze, Dragon_Clan (and his many names), pimuni, Bronze_Umbreon, Aglandiir, SandslashAndNinetales, andyizcool,...

People who keep leaving and coming back or who's status is uncertain:
Antish Superstar, QuickSilver, MarshmallowEgg, Mist/PancaKe, Dark Dragonite, Silver Ledian, Ledian_X, Pikachu101, Darkfire,...

People who never left (regardless of the time they joined):
Nala98/Wolfsong, Blastoise Fan/Phantom of Innocence-bf, Little_Pikachu, Zak, Chris, The_Missing_Link, Charizard04621, classy_cat18, TheBlueAvenger, Ace64, mr_pikachu,...

Still here but no longer the person he used to be or I thought he was:
Citrus Crush Chikorita/Last Exile.