Which faction did you side with in Fallout 4?

I'm honestly surprised the Institute are #2, it's not an outcome I would expect from the FO4 subreddit.

But I generally side with the Institute.

I'm surprised the Brotherhood isn't doing better because of Danse fans, but I'm also proud of all of you for mostly not picking my least favorite choice. lol

The Railroad does set up patrols, maybe not as much as the other factions. I have seen them though.

I'm a dirty ghoul fucker, so no Brotherhood for me.
I've started so many different saves in this game, but I've only ever done the full main story once, and that was kind of in a rush. I ended up going the Railroad route for that one, mostly because I was in the middle of doing other quests for them when the whole final quest chain started coming up for me, and I was kind of in the middle of it before I realized I was hitting the end game.
Since then, I've really only focused on the settlement management aspect of the game (with the help of a ton of mods), so I guess that makes me most in line with the Minutemen. I even build a few recruitment offices and Minutemen compounds in my settlements just for flavor. I deliberately avoid triggering Act 2, which means I never get further into the Brotherhood than doing a few radiant missions for them.
Deacon is one of my favorite companions, and I actually enjoy the Railroad quests. I generally agree with the notion that all sentient beings deserve autonomy, so I'm happy to help them out. But it's not my main cause. As far as I'm concerned, the settlements I build welcome all, humans, ghouls, synths, but I'm not going to focus my efforts exclusively on one group.
If I ever get around to actually playing the main story again, I will go Minutemen for the final route. But I'm really meh on the whole thing. Don't care about Shaun. Don't want the Act 2 Brotherhood vertibirds dropping out of the sky all the time. I just want to build my settlement empire.

My first run was the Minutemen ending, though I belonged to the Railroad as well. I almost did the Railroad ending, but I'd been with the Minutemen longer and decided to see it through.

My next (unfinished run) has my Sole Survivor as part of the Brotherhood of Steel, though I might have her turn on them and join the Institute.

I just started a new run a couple of weeks ago. I kept thinking about how useful all the scrap I was picking up in ME:A would be for building settlements, if ME:A had a real system for that. So here I go again.
I'm not even planning on getting to the end game. Maybe I will, but not until I've established a settlement empire. And I'm going to do my usual romancing of Cait and Hancock while completely ignoring Shaun forever. I never get too invested in the prewar backstory, but I made it work into my pansexual polyamory thing by headcanoning that Nate & my character were involved in a threesome with the drug dealer that lived in the yellow house nearest the bridge to Concord (the terminal in the house mentions an 'army connection' who I headcanon is Nate). 

This is a tough one for me. I like the institute's shiny and the fact that it has toilet roll (and flushing toilets, for that matter) but its evilness kind of makes me wrinkle my nose a bit. I guess a lot of its evil was thanks to Psycho Shaun, and being its new owner I could reform it into something nice and cuddly, but it was just too tempting to reform it by blowing it up. Obviously I've watched Dark Star too often.

Of the other three I usually end up going with the Railroad: although they are kind of Guardianistas, the BoS have too many bell ends and the Minutemen have Preston. D: Though actually I end up trying to get all three to play nice.