Inspired by the concurrent tavern thread on a sci-fi-related matter
The 'grays' are way too boring, in my view, as a concept of an alien form.
Giger's 'Alien' had a distinctive form, despite some strange (or unscientific?) concepts attributed to it in the films (such as having a sort of corrosive acid as 'blood').
Insect-based aliens tend to look more ominous, most of the time anyway. Not surprising, given than most insects look 'alien' to begin with
Alien 'gods' like Yog-Sothoth are even more interesting for me:

The 'grays' are way too boring, in my view, as a concept of an alien form.
Giger's 'Alien' had a distinctive form, despite some strange (or unscientific?) concepts attributed to it in the films (such as having a sort of corrosive acid as 'blood').
Insect-based aliens tend to look more ominous, most of the time anyway. Not surprising, given than most insects look 'alien' to begin with

Alien 'gods' like Yog-Sothoth are even more interesting for me:
