Race
There are many races to choose from, and this is one of the first choices a player must make for their character. Each race will have racial modifiers to consider, which may add or subtract to skills or core attributes. Some races see better in the dark, while some are blind in it. Some races can see the variations of temperature, while some have naturally-hard hide that acts as armor. There is also the story in your campaign to consider, and how tensions between races could affect your choice.