I've been cosplaying for a long time now, and it's really easy to lose track of who I've been. I'll try to list everyone here, chronologically!

[1997] [1]
Sailor Moon - Sailor Moon

[1999] [1]
Misty - Pokémon

[2000] [1]
Sakura - Card Captors (...ahem)

[2002] [2]
Sakuma Ryuuichi - Gravitation [black & red outfit]
Sakuma Ryuuichi - Gravitation [yellow sweater outfit]

[2003] [3]
Uesugi Tatsuha - Graviation
Motosuwa Hideki - Chobits
Kisaragi Yuffie - Kingdom Hearts

[2004] [2]
Naruto - Naruto
Battle Royale Student - Battle Royale

[2005] [4]
Horohoro - Shaman King
Tao Ren - Shaman King [commission]
Slytherin Cloak - Harry Potter
Utena Tenjou - Revolutionary Girl Utena [commission]

[2006] [6]
Alphonse Elric - Full Metal Alchemist [original design human ver. before the movie came out]
L - Death Note
Light - Death Note
Urahara Kisuke - Bleach
Roxas - Kingdom Hearts II
Hayner - Kingdom Hearts II [commission]

[2007] [6]
Kaoru Hitachiin - Ouran High School Host Club
Matt - Death Note
Ritsuka - Loveless [green and black outfit]
Ritsuka - Loveless [overalls artbook ver.]
Haruhi Fujioka - Ouran High School Host Club [remade jacket]
Roxas - Kingdom Hearts II [remake]

[2008] [17]
Lelouch - Code Geass [school uniform]
Mizuka - Sengoku Ace Episode III [commission]
Hiro Sohma - Fruits Basket
Ken Amada - Persona 3
Tsuna - Katekyo Hitman Reborn
Spanner - Katekyo Hitman Reborn
Gokudera Hayato - Katekyo Hitman Reborn [10YL arc]
Gokudera Hayato - Katekyo Hitman Reborn [OST cover image]
Gokudera Hayato - Katekyo Hitman Reborn [baseball uniform]
Takeshi Yamamoto - Katekyo Hitman Reborn [10YL scan]
Izumi Konata - Lucky Star [pink valentines maid dresses]
Rokujou Miharu - Nabari no Ou [green frog apron]
Death the Kid - Soul Eater
Kururugi Suzaku - Code Geass [school uniform]
Rolo - Code Geass [school uniform]
Derek Stiles - Trauma Center: Under the Knife 2
Rolo - Code Geass [black knights uniform from Pash poster)

[2009] [8]
Gokudera Hayato - Katekyo Hitman Reborn [bloodied up school uniform ver.]
Kururugi Suzaku - Code Geass [kendo uniform]
Mashiro "Saiko" Moritaka - Bakuman
Kagura - Gintama [yoshiwara arc]
Yako Katsuragi - Majin Tantei Nougami Neuro
Misty - Pokemon
Kagura - Gintama [episode 65; beetle catching ep.]
Hildegarde - Beelzebub


Costume Total: 51
Commissions: 4

I've done a lot of ghetto cosplaying in between but that's not counted ;;