This might be a dumb question (and answered many times), but does a Dark Urge character have to look like that stupid lizard thing? Makes me think of the Gorn from Star Trek.
Dragonborn are one of the most popular 5e races and no you don't have to be one.
Drgonborn surpass my personal goofiness threshold. But, that's just me. And I haven't seen any evidence of them being very popular in PnP. Tieflings, on the other hand, are very popular in my experience, especially with Zoomers and younger Millennials.
And thank you for the info.