They are complicated, very few rarely make sense when emotional, very few make rational decisions when emotional, many are dependent on something to keep them going, humans can be desensitized to just not care about anything, humans can overcome many obstacles, humans can make many obstacles, they can be mischievous, they can be saints, etc etc. What are you wanting specifically? Oh! Most are generally born with 2 arms and 2 legs, a head, and a tail... the tail is always cut off though so most of us don't believe we truly had them... ummm... what else you looking for?
most of us spend like 5 hrs playing video games (hum guyz) that or watching tv (guyz and girlz) and that 1/2 (i think) of our popularity is obese:( and that we are cutting down trees like never before and killing animals for some stupid worthless piece of crappy paper (aka $ ) and if ur planing to kill everyone let me help u with the order omg jk ;) make sure u tell ur alien peers to stay away from me im 13 dark hair and like 5'1 thanks people call me ema :) (stay away from my family to)i dont think it can be any worse then what we are doing:'( makes me sad
We were originally herbivores, but evolved into omnivores to survive harsh winters as indigenous people and society has stayed that way ever since. If you don't believe me take a good look at your dog ( which is and omnivore ) and do some comparing and contrasting. Or look it up. :)