I've never really had a problem with spiders. They seem to know their place. Hardly ever seen or heard. On the rare occasion that a spider does make it into the house, I've been known to catch it and release it back into the wild. Spiders are cool with me. *high five's a spider*
As for mosquitoes (I've just found out that there is an "e" in mosquitoes. I thought it was "mosquitos"), they don't really bother me that much, either. I'll kill a mosquito with my bare hands with a quick "smack"! I wouldn't dream of killing a fly, roach, or spider with my hand. Yes, a mosquito will suck your blood but you already have too much blood. Stop being so greedy.
Flys are filthy and disgusting nobody ever really freaks out when confronted by a fly. As long as it doesn't land on my food, I'll just brush it away. Now, multiple flies are fucking disgusting but one fly on his own, I won't even bother to try and kill it. It only lives for a day, anyway, right? Fun fact: After seeing the Karate Kid back in the 80's, young d21lewis decided to try and pluck a fly out of the sky with a pair of tweezers. It actually worked!
So that just leaves the roach. I hate fucking roaches. I don't think that there's a bigger sign that a home is disgusting than if a roach suddenly appears. As a cop, I went to a house and touched a picture frame while talking to the homeowner. A dozen roaches ran from that frame in every fucking direction. Disgusting. They leave their eggs everywhere. They leave roach shit everywhere. They stink. They get everywhere. They don't care who sees them. When I was in high school (I admit, we didn't have the cleanest house in the world), we had roaches. I learned to hat them. Once, I sat my backpack on my desk and a roach hopped out. He said "California, here I come!". I was so terrified that somebody would see that I crushed that roach with my bare hand and kept my hand on it there until the end of the class. I hate roaches. I'm glad my home is 99% bug free.
In groups, I probably would be disgusted by flys, more. Individually, I fucking hate roaches.