Sure, I didn't mean to imply that whatever race you choose for your viking race would then only be a viking race, you could have some elf vikings, and in another continent you could have elves that are modeled after african tribes, or some elves running a version of the Dutch East India Trading Company. The main point was to not shackle yourself to the more straightforward tropes of using the traditional definition of the fantasy race determining what it should be like for all it's societies in your game. (Ie orcs being tribesmen/barbarians, elves being nature lovers, dwarves being technological) -- break some molds and mix things up.
yeah tropes are what i'm trying to avoid for the most part like for example rather than elves being the typical good nature lovers, a lot of aspects of them are similar to behaviours of folklore and they originally enslaved humans when they first entered the world
Why? It gives the player something familiar, which generally it's a good thing. It's especially useful when there are many cultures, if you have one or two, sure, go for pure uniqueness, but if you have like a dozen it would be overwhelmed to the player, it's easier then for the player to relate to them like "viking elves"