Alrighty. I think my totals are correct. All of the cart based games, I have loose copies of for playing (except Castlevania 64, which I found an empty box and put my cart into it).
70 Castlevania Items in Collection
51 Castlevania Games
5 Castlevania OST's (3 bonus cds, 2 "digital downloads")
6 Castlevania Guides
8 Castlevania Swag Pieces: 4 Action Figures, 1 figurine, 2 CDs (1 mini soundtrack and the Castlevania Anniversary Bundle) and a graphic novel.
Breakdown by Console
Nintendo Consoles6 Castlevania games on NES: 3 CIB, 3 Loose
1 Castlevania game on Famicom: 1 Loose
4 Castlevania games on SNES: 2 CIB, 2 Loose
3 Castlevania games on N64: 2 CIB, 1 Loose
1 Castlevania game on Wii: 1 CIB
1 Castlevania game on WiiWare: Digital
7 Castlevania games on Game Boy: 3 CIB, 4 Loose
10 Castlevania games on GBA: 5 CIB (1 Sealed), 4 in Custom Cases, 1 Loose
4 Castlevania games on Nintendo DS: 4 CIB
Sega Consoles1 Castlevania game on Genesis: 1 CIB
1 Castlevania game on Saturn: 1 CIB
Sony Consoles3 Castlevania games on PlayStation: 3 CIB
1 Castlevania game on PlaySation 2: 1 CIB
1 Castlevania game on PSP: 1 CIB
Mircosoft Consoles1 Castlevania game on Xbox: 1 CIB
1 Castlevania game on Xbox 360: 1 CIB
2 Castlevania games on XBLA: Digital
PC2 Castlevania games on PC: 1 CIB (sealed), 1 Loose
PC Engine SuperCD1 Castlevania games on PC Engine: 1 CIB
I've also recorded songs off of the original 3 for custom ringtones on my phone.