Help me profile aliens please.

Alright. I got an idea. Maybe if we "profile" the different types of aliens that are believed to be visiting earth we may have a better idea of were they are coming from.

E.g. Greys- Large eyes,all or mostly black (comes from a low light world) - grey skin(also, camo for a low light world) - skinny(low muscle mass, smaller predators on home world) - large head (high intellegence, intellegence was more important or useful for survival) - moist skin, depends on who you are tlking to(lives on water or marsh covered world) - some belive them to have telepathic and telekinetic abilities(talking would be either difficult, such as if they live under water while developing part way, or talking would attract way to many predators)

it is all specilation, but I say learn as much about someone before you meet them.

All this information is already on this site...on articles