Blueprint Ai or Behavior Trees?

I have just started in UE4 and i am really enjoying it. WHile watching Youtube videos and such on AI, my favorite so far has been VirtusEdu, but he does Ai in the actual blueprints via Move-to nodes and other things, but i was wondering if AI is best handled with Behavior trees. I have never worked with them and continuing to use just nodes in the blueprints is going to get clustered fast.