Lizardmen are my favorite fantasy race, and WoW could very much use some reptilian races. There are a couple that already exist that would make great additions: Sethrak and Saurok.
Both would bring in a lot of variety and are different enough from each other that they could both be playable and bring some unique features to the game while adding a lot of flavor to the character creation.
I could go on and on about why they would work very well as playable races, but I’d likely be typing a thesis paper at this point. Instead, I’ll just point folks to the two megathreads of them. They have a lot of great ideas and ongoing discussions about those races while showing support for them being playable.
For Sethrak fans, be sure to check out the Sethrak megathread:
And for those interested in Saurok, I operate the Saurok megathread here:
Let’s get some reptiles on that character creation screen! 
