What are your opinions about every major faction?

For me personally, the Brotherhood is the most professional and organized faction. I prefer them over everyone else despite the way they talk about non-human people.

The railroad are just a bunch of underground boonies that have dreams too big to execute. Even after destroying the Institute, they STILL need help getting the stray synths to safety, and they need me to do it while they sit on their ass. Had I not come through to help them, they would have never been able to do it themselves. At least the brotherhood has a good chance of destroying the institute without me.

The brotherhood has immense amount of power that they actually use. I see knights and scribes out in the Commonwealth actually doing things, not just hanging out in the prydwin or Boston airport. They're very helpful when I'm fighting hostiles and they give a helping hand.

The Minutemen are noble people, but I can't get past Preston's snappy attitude when we first met. I accidentally walked past him when he started talking and he said "so that's it? You're just gonna walk away?" Come on dude. Then he talks big about getting the Minutemen back in order when it's really just me doing the leg work while they hang out at the castle.

And the Institute is just full of people who are too cowardly to see the world for what it truly is. They stay in the safe, clean, comfortable environment while endangering the entire Commonwealth in the name of experimenting. This faction would have been a good choice despite that, but Shaun only views me as another experiment rather than a person. I understand he doesn't view me as his father, but he threw so many dangerous things at me just to see how I would respond. He KNEW of Kellogg's violent nature and threw him at me on purpose, how rude.