brent themes hopefully plural
I would prefer that Budgie develop a default internal theme as the Budgie "signature theme", with the light/dark/black variants @Solarmass proposed, while continuing to allow users to install different themes if the mood moves them.
My view (based on reading threads/reviews over the years) is that Budgie's sophisticated design defaults are what initially attracted users to Budgie, although Budgie's functionality and intuitive user interface kept users in the long run. Without both, Budgie would become just another "nothing special" desktop environment.
I've wondered, on and off, who created the design that changed Budgie's visual impact from "meh" to "wow". I did a little research a while back, but found nothing. Maybe it was Ikey, maybe someone else. Whoever was responsible, Budgie bears the fingerprints of a talented designer.