Are certain aliens too difficult to take seriously?

[Melakon]

Shaka, when the walls fell.

 

[lurok]

Glad they included ds9's Wadi and Dosi here

 

[Anji]

All of this comes down to two things: money and time...do they have the money in the budget to do it and do they have the time to get the appliances and costumes ready. Most of these series had to produce an episode in under two weeks, which is quite a feat!

 

[Captain McBain]

What is the in-universe reason for a great deal of humans and Vulcans?