I collect Biweekly Hana to Yume and Weekly Shounen Jump and have a few Nakayoshi's, Ribon's and Magaret's here and there. Sometimes I get Betsuhana if it has Kaori Yuki manga in it.
So I have about… 58 phonebook mangas (about).
I have 3 artbooks: One Piece Colour Walk 1 (Can't find two :(), Angel Cage (Angel Sanctuary) and Lost Angel (Angel Sanctuary).
All my manga is in Japanese with the exception of 4:
One Piece: 1-36
One Piece Red
One Piece Blue
One Piece Red (Italian)
One Piece Group Doujinshi
One Piece Sanji Doujinshi
Naruto Character Guide
Naruto: 1-14
Hellsing: 1-3
Card Captor Sakura: 1, 3 and 4 (Bilingual Japanese-English)
Love Wan: 1-2
Bleach: 1-3, 5
Full Metal Alchemist: 1
Shaman King: 1-4, 13, 31
Angel Sanctuary: 1-20
Count Cain: SOAB and Kafka
Count Cain: GodChild 1-8
Cruel Fairytales
Boys Next Door
Ludwig Revolution
Neji // SCREW
X/1999: 1
Fushigi Yuugi: 13, 17
Kaine
Sareki Ou Kuni
Bloodhound DX
Pretty Soldier Sailor Moon 5
Battle Royale: 1-6, 13
Tetsuwan Atom: 1