> Oh, if we're doing movies, I'm really tired of aliens who are human with laytex foreheads.

To be fair, there are very few actors who don't look basically human. For movies, it got to the point that a main character could be represented with CGI a handful of years ago, but TV shows, with their longer runs and lower budgets, still have to make do with actors in make-up. I think the other issue is that audiences might not emotionally connect with characters that don't bear any resemblance to anything they know about.

What I find rather more annoying is the idea that all alien races can successfully interbreed. I mean, you have more chance of being able to have a baby with an ear of corn than with a vulcan...