let me blow you all out of the water here.....
1) Aliens do hunt alone and quite better then a predator.
2) I love my moma.
And i'd protect her day of the week.
3) Being a moma's boy ain't a bad thing and not all aliens came from that queen so they could be potentail love intrest.
4) When alone they display a very high level of hunting instinct. They are also very intelligent able to use the enviroment to there advantage while a predator uses that whimpy cloaking. I mean why need cloaking when you can hide in the enviroment perfectly.
5) Acid for blood.
6) able to move at fast speeds or just remain motionless entirely.
they do learn tricks but the not the tricks you want them to learn, like play dead. (you walk up to it, it looks dead, BOOM head bite)
9) They're clever
10) just to sound like a nut job and normal on this site. "Perfect lifeform"
11) Razor sharp claws, teeth, and mighty powerful tail.
12) can get close to you and you wouldn't know it, when was the last time a predator got close to a guy with out them noticing? Only thing stealthy about a pred is that cloaking. It makes way too much noise! With all of its clicking and roars god man!!!
I'm sure i can think of more....give me a second lol.