I like it when we get new aliens that look very similar to established aliens. There’s so many species out there, especially in TOS, and early TNG, that are just humans with a silly hat. When we see Mintakans (Vulcans/Romulans), or DS9 Trill (Kriosans), or even Denobulans (Cardassians), it makes me glad to know that evolution does not just make a bunch of different humans with an occasional one off.