Honestly probably one of the hardest moral dilemmas I had in a video game. I loved the brotherhood because -blam!-ing Danse right? Railroad is great because the fight for the freedom of synths, and finally the institute where [spoiler]your own son is the leader, and he wants you to succeed him as head of the Institute[/spoiler] I thought all factions had merit. In the end though I went with the institute. The brother hate everything non human (rasicts). The railroad, although moral, wanted to destroy synth creation and the best hope for progress. As the institute: [spoiler]being the next leader, you could free the synths from their oppression, as well as get to see your sons dreams come true.[/spoiler] It was hard betraying everyone, but I guess Bethesda didn't want a situation were you could solve the main conflict using charisma like in all the other fallout games.

Institute, the most reasonable out of the lot IMO.

[i]We are the Borg. Lower your shields and surrender your ships. We will add your biological and technological distinctiveness to our own. Your culture will adapt to service us. Resistance is futile.[/i]

Not there yet. If I have to choose one, it'll likely be the Brotherhood. Otherwise, I want to keep on good terms with each one. Shit, you'd think that these organizations would do more research on who they're letting in.

Minutemen

There's this nice dude named Benjamin that I keep in my wallet.

I'm trying to keep them all as friends until the very last moment. I continue to do all of their quest lines without giving Father a straight answer. The final battle shall be epic