Should I use Unity's Animator for a Finite State Machine or should I create my own FSM?

I am really torn on this one. I am just creating a 2D platformer for practice.

 

I'd go with their animator. You can experience the ins and outs of their system. If you want to create your own system, that will give you a better starting point because you know what you like or dislike about their system.

 

Okay then hehe

 

Because it's closed source, it might also be helpful to look at the backbone of open source FSMs:
https://github.com/thefuntastic/Unity3d-Finite-State-Machine
https://github.com/dubit/unity-fsm
https://github.com/minhhh/unity-fsm