I'd like to know what traits the Dwemer have in terms of character creation on the ES games. For example, Wood Elves are good at archery. Is it known what the Dwemer were good at?
The Dwemer have never been (officially) playable and in the entire series we have only encountered one live Dwemer (and he was suffering from a crippling disease). There are thus no official sources to cite regarding what they would have been good at and what perks they would have imparted from a gameplay perspective.
However, there is a fair bit of lore about them, most of which serves to underscore the fact that they were excellent craftspeople and engineers, both of the physical and of the arcane.
From the UESP wiki:
The Dwemer appear to have been a highly technologically advanced and particularly dogmatic race. Others races have still not cracked the secret behind their metal.
Their creations have survived for hundreds of years after their race vanished, some of them completely intact and functional. Their use of steam and geothermal power has not been widely reproduced in the rest of Tamriel, even at the time of Skyrim, which is (iirc) the most-recent era of Tamriel we've seen so far.
In addition to powering devices through mechanical means, they were also very adept at magical artifice (nearly all of their constructs, the guardians and spider-droids, appear to derive their power from soul gems or similar magical devices).
We can theorize, then, that they would be highly intelligent and proficient with magic, and that from a gameplay perspective one might see boosts to skills that dealt with passive magical abilities and construction skills. That is, they'd probably be good at enchanting and smithing and the like, not necessarily destruction, illusion or conjuration magic.