What kinds of aliens are friendly to human and which are the most intelligent?

Question

Do you guys have any ideas?

if there are pictures about them would be great...

Why some aliens grey look cute and friendly while others look evil???any ideas?

Answer 1

Dolphins.

Answer 2

You are so flippin' stupid I can't even take it....

Do you think alien actually EXIST?

Answer 3

*IF* aliens exist, none have ever came to Earth. Speculating about their intellectual level or friendliness is akin to wonder what is the color of unicorns.

Answer 4

I vote for Vulcans.  They seem pretty smart....