I sided with the railroad because, y'know; the guerrilla, freedom-fighter-y aesthetic appealed to me. I felt like synths deserved to be free, especially after meeting Nick earlier in the game. I was down to blow those MIT fucks to the moon. However, once I met the Institute and learned my son was the faction head and that they had the tech to make the world a better place above, I changed my plans. I wanted to work undercover and gain clout within the Institute--maybe free some synths while I was in there. Make a name for myself and maybe change some minds about the nature of synths and everything (using my fairly high charisma skill I put five extra points into). I wanted to peacefully get the Institute to see my way and begin giving synths their freedom and helping out above ground as well. Once I learned my son was dying of cancer and was having me appointed faction head, I was even more excited to do this my way--as director I could call the shots entirely regarding synths.
So you can probably imagine my disappointment when the game decides having a diplomatic option is for squares and gives me a series of Institute/Railroad missions consisting of:
- The Brotherhood of Steel is in our way, so go blow 'em the fuck up
- Your Minutemen are in our way, so go tell them to stand down (much to their distaste) or go blow 'em the fuck up
- Even though you're the leader of the fucking Institute, you can't work with the Railroad, so go blow 'em the fuck up or GTFO
I chose siding with the Railroad in that last one so I was rewarded with:
- The Institute -- despite having valuable tech able to revitalize the entire fucking wasteland and a fucking reactor capable of giving power to everyone -- doesn't like us SO BLOW UP THE FUCKING WHOLE BASE.
I ran through two and a half (BoS) questlines to try and get people to play nice and I was rewarded with the task of killing two of the three big factions regardless. Fuck that jazz. At least in New Vegas I could take the Strip for myself without killing Caesar or General Oliver or even fucking Benny or Mr. House for that matter.