I got into Amiibo slightly later after release. most of them were sold out so i started with a Fox and Pikachu. eventually it grew to about...32 SSB Amiibo. my brother has Link. i don't have Meta Knight, Lucina, Pit, Captain Falcon, Greninja, Jigglypuff, Mega Man and Sonic. got ROB/DHD/G&W pre-ordered and Dedede/Little Mac coming in the post.
I just feel that Nintendo doesn't really utilize the Amiibo that much, i mean it started off with Smash to help promote sales, but the games they're featured in has drifting genre cross-pollination with each over, like Namco was one of the main developers of Smash but how many people would go for Ace Combat...i doubt One Piece gets outside of Japan. Code Name STEAM already has competition within the 2nd party developers who created Fire Emblem/Advance Wars itself and even then...it's just for the Fire Emblem amiibo which at the time ranged from either infamously rare (Marth) or has shaky rarity like Ike/Robin.
Plus there's the case about the Pokemon amiibo, who themselves are used in less games than even Pac-Man, Mega Man AND Sonic. would be a bit thin if they're only used for Pokken Fighters. the idea of selling games with Amiibo is plain weird, i mean it might be justified with Splatoon since it's a new franchise, but Chibi Robo's games has mostly been unreleased outside of Japan and had to change genres just to justify a release which so far makes the amiibo looks like a necessity for the game; it might be like the Kid Icarus: Uprising situation where you can only get the 3DS stands with the game but it might not come with preowned copies which has an ulterior motive of artificially generating sales just for collectors of the amiibo.
Make nice little showoff pieces for franchises with not so much merch, they are £10ish figures, they're just alright. only main complaint is the sheer amount of human characters added during Smash 4 makes the heads slightly generic, Shulk/Robin has that matted hair thing going on. characters like Kirby, Ness, Mario, Yoshi and Bowser Jr is pretty game accurate.
EDIT: Forgot to mention Rosalina in the post too.