Tinker Gnome
Adventurer
Did anyone use the Favored Class rule by enforcing experience penalties in 3.X? I never even thought about it, but I can only recall one character who was ever multiclassed last time I ran a game.
I'm 99% in agreement with this; the only 1% that I disagree with is that, whenever someone writes a new race, it's necessary (not strictly so, but it's prevalent enough to have become expected) to write a bunch of alternative favored class options for various classes. Likewise, when writing a new class you're expected to come up with favored class options for various races. So it added a bit of extra work to race and class design.Pathfinder 1e solved this very neatly.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.