Just some clarification: when choosing a favoured enemy (using the Unearthed Arcana rules), can a ranger choose "Humanoid" in general, so use the bonus for all humanoids?
I have read it this way (hitting an orc or elf in the privates or the heart will hurt it pretty much the same). I have just come across another DM who will only allow one type of humanoid.
Choose a type of favored enemy: beasts, fey, humanoids, monstrosities, or undead. You gain a +2 bonus to damage rolls with weapon attacks against creatures of the chosen type.
UA Revised Ranger would allow "humanoid" as a general selection. (The first UA ranger had no favored enemy.)
PHB rangers specified that a ranger needed to choose only some races of humanoid for their favored enemy:
The revision specifically removes that limitation on humanoids:
Finally, humanoids don't have "types," "humanoid" is a type.
See MM p.6.