Since offically starting collecting of what titles I had of various systems and started to get I've noticed myself collecting (and trying to) collect moreso NES carts, mainly for my goals and seen my count rise recently with my trade with ClubNinja to 45 carts (mostly loose). Most this going towards my Tengen cart goals and after entering all the rarity numbers onto my spreadsheet, noticed I actually do have alot of R3's and up now.

This is just of my NES carts now.
Key: cart/company/rarity/cart, manual, box/comments

1943 Capcom R2 C
191-in-1 Multicart NA NA C
Alien Syndrome Tengen R2 C Unlicensed.
Bad News Baseball Tecmo R3 C
Blaster Master Sunsoft R1 C
Castlevania 3: Dracula's Curse Konami R2 C
Dr. Mario Nintendo R1 C, M
Dragon Warrior Enix R2 C
Dragon Warrior 2 Enix R5 C, M
Dragon Warrior 3 Enix R4 C, M
Dragon Warrior 4 Enix R6 C, M
Fantasy Zone Tengen R3 C Unlicensed.
Gauntlet Tengen R1 C, M Unlicensed.
Jackal Konami R1 C
Joust Hal America R3 C
Kirby's Adventure Nintendo R3 C
Klax Tengen R4 C Unlicensed.
Krazy Kreatures A.V.E. R5 C Unlicensed.
Kubuki: Quantum Fighter 191-in-1 R4 C
Legend of Zelda Nintendo R1 C
Lifeforce Konami R1 C
Mega Man Capcom R3 C, M
Mega Man 2 Capcom R2 C
Mega Man 4 Capcom R3 C, M
Mega Man 6 Nintendo R5 C, M
Ms. Pac-Man Tengen R5 C Unlicensed.
Ninja Gaiden Tecmo R1 C, M
Pac-Man Tengen R3 C Licenced version.
Pac-Man Tengen R3 C Unlicensed.
Pacmania Tengen R6 C Unlicensed.
Pin-Bot Nintendo R4 C
Punch-Out! Nintedo R3 C
R.C. Pro AM Nintendo R1 C
RBI Baseball Tengen R1 C Unlicensed.
RBI Baseball 2 Tengen R2 C Unlicensed.
RBI Baseball 3 Tengen R3 C Unlicensed.
Skull & Crossbones Tengen R4 C Unlicensed.
Super C Konami R1 C
Super Sprint Tengen R2 C Unlicensed.
Tetris 2 Nintendo R3 C
Totally Rad Jaleco R3 C
Ultimate Stuntman Camerica R3 C Unlicensed.
Videomation T*HQ R5 Complete
Where in Time is Carmen Sandiego? Konami R5 C Came with Encyclopedia.
Zoda's Revenge: Startropics 2 Nintendo R2 C, M