I am new here - just completed free 10-day trial and decided, what the heck, so I bought the game. I have rolled a Ranger mixture and I am wondering about favored enemies.

Does this Ranger ability make much of a difference? How much of your gaming deals with foes other than what are on your FE list? I was not planning on taking any enemy-related enhancements. Is this an obvious bad decision?

I had asked before what enemies are common and good for this, and have read these are the "best" to consider:
undead, giant, evil outsider, construct, aberration
Any comments on this? What levels are these usually good for?

(Yeah - I know - I probably should have searched the forums, as I am sure these topics have been discussed, but I wanted to get current feedback.)

TIA