i know i know! you guys have been giddy and waiting for this.....
"PLEASE viniie! i simply NEED to know what isaacs favorite animatronic is!PLEASEEE GOD" heh. dont worry dear chum. ill tell you. not only that- but i will also tell you what their favorite fnaf songs are! lucky you! "OH GOODIE! thank you so much you are soo awesome and talented im so happy right now ^^" lol. no problem. hehe
the official list (canon):
Thats it. that was he special.