A fun little quiz can be found here. I’m Stewie! 
For the first time in my life, I’ve finally found a personality test that I agree with the results. 
Ah, Stewie…
Is this thing rigged or something?
“DAMN THE BROCOLI, DAMN THE WRIGHT BROTHERS, AND DAMN YOU, YOU VILE WOMEN!”
(I have not seen it in awhile but I believe that is the quote…)
I’m Brian. Allll,riightt. 
Just kidding, I know thats Quagmire. But really Im Brian-
I object! I only checked off two obviously “Peter-y” answers, (I’m fat, and I picked the “pig in a blanket” quote) and I’m Peter? I don’t even watch TV!
I want a recount, and if anyone asks, my name is Brian. Okay, okay, Meg! But definitely not Peter.
I’m Peter, too. And I so wanted to be Brian! Maybe I should drink more…
Not unexpectedly, I’m Lois. It fits pretty well, as long as you take into account the whole “Holly Jolly butt” incident.
The safety word is “banana.”
I’m in better shape, but it sounds about right.
First Lois checking in here.
I saw it coming…
I think the quotes are weighted more heavily than they out to be. I got Cleveland and Stewie by changing my answer in the quote between Cleveland and Stewie quotes. No doubt I could have gotten Brian or Peter or Quagmire, etc by doing the same. I never bothered checking.
I thought the same thing, myself, and tried it out, but it really didn’t seem to make any difference.
I’m Quagmire.
All right!
This quiz gave me a mortal insult.
It called me Cleveland.
“Proud of this? Probably not.”
Damn! My name has betrayed me! It says I’m Peter 
Peter here.
That test is weird. Other than being fat and wearing glasses, there’s no similarity at all.
Stewie, here.
Victory is MINE!
Stewie here.
Guess I better get to work on that weather control device.
Peter. I wanted to be Brian. But I was Peter.
HA ha!!
I’m Brian!!
He and Stewie are my favorite.
Looks like I’m the first Meg.
“You are a fairly well put together person, but you have some trouble finding an identity that is truly yours. You’ve made significant efforts to fit into various groups, but you really don’t seem to fit into any of them.”
Saw that one coming.
I’m Lois, but I knew that. Being that I’m the hot redhead :D, and I’m married to, well, Peter. We affectionately call him Dave.