I was wondering when creating a race in Pathfinder 1e, are you able to give them two racial type qualities like Fey and Humanoids for example or is it just one type only? I ask because I was looking to create a race and I wanted to understand how loose the race creator is for Pathfinder 1e.
The rules for creating new races start with selecting racial type qualities. Just before this section it states:
You must select an option from each of the following quality categories. [emphasis added]
Similarly the language in the type qualities section is singular.
This strongly implies to me that the assumption is that you can only select one type. This is certainly the case in Hero Lab's implementation of these race creation rules (Hero Lab is not an official source, and is simply used to provide corroboration of my interpretation).
It is possible that two racial qualities would give you access to a combination of abilities that would 'break the game' more than the options already available can. However, if that stuff is not your goal, then I as a GM would still let you take more than one racial quality. I.e. I would vet the overall build for balance against the other party members - as I would do anyway even if you didn't use more than one racial type.
As per KRyan's comments, the rules don't define what multiple racial types means, and a book using them wouldn't get published without working out those definitions, but for a home game this is not an issue.
Besides the concern above, taking more than one racial quality in and of itself is unlikely to unbalance the game.
In the rules for creating new races the Humanoid type states:
Every humanoid creature also has a subtype to matchits race, such as human, giant, goblinoid, reptilian, or tengu. If you are making a new humanoid race, you should either find an existing sutype to match or make a new one by using the name of the race as the subtype. If you are making a half-breed race, it should have the racial type of both parent races.
So while you can only choose one racial type, the Humanoid race type can have multiple subtypes. And the rules on humanoid subtypes simply let you create a Humanoid(fey) subtype to use for half-breeds. Mechanically this presents little to none difference to actually using the Fey-type.