As to being evil, I don't care. Being "evil" in an RPG is so childish anyway, it usually just comes down to senseless violence for the sake of violence and besides, what's the point in being evil if it isn't acknowledged? But the biggest issue I have with Skyrim's quests is that it is "do or don't do". Yes. You c can be evil. IF... You do an evil quest. However, if you do a quest where your character does it for the sake of being good then you usually don't get a choice in the matter if you want to complete the quest. So yeah, you can be evil, if you do an evil quest. So what? That's not really roleplaying to me. Roleplaying would be allowing me the option to be greedy, heartless or altruistic in a quest. How many quests actually allow that in Skyrim? Most of the time the only roleplaying option you get is if you go out of your way to make-believe roleplay. Like, oh I'll look for this girls pendant but when I find it I'm gonna keep it to myself and never complete the quest.
In Fallout 4 you can crush some radio hosts dream.
You can sabotage a ship of robots that just wanna reach water.
You can let loose a super mutant that's clearly off his rockers and let him wander about civilized areas.
You can eat people.
You can side with a bunch of genocidal maniacs (Brotherhood/Institute).
You can sell a ghoul kid to some random merc.
There's lots of time that you can be "evil" in Fallout 4.
And that's the thing. Fallout 4 gives you the option to be evil during these quests/events.
Whereas in Skyrim, if you want to do the Dark Brotherhood questline then you 'have' to be evil.
There is no choice.
And hell, if we follow Skyrim's example of "do or do not" when it comes to quests then it just opens up even more options to be evil in Fallout 4. For example; You could scrap all of Sanctuary Hills and let Preston and his cronies have nothing and then just leave. You could avoid ever finding your son or shooting him on the spot when you see him as "Father". You could behave like an asshole to your companions constantly. You could let that dumb ghoul kid stay locked up in the fridge.
See how easy it is to be "evil" when it comes to "do or don't do"?
For the most part I agree with what you're saying, except for this big ole segment right here.
First of all eating people happens in Skyrim too, you just need the Ring of Nemeria to do it, which you get by joining a cannibal cult. Skyrim lets you join evil genocidal maniacs too, the cannibal cults and the many cults of the daedra. So that's not really a contest either. In fact, Skyrim has a lot more evil factions you can actually join instead of just 1 debatedly evil faction, the Institute. You also mention how you can not give a rat's ass about your kid and shoot Shaun on sight when you first meet him, but I can do that for shittons of Skyrim characters too. Raeloff's probably a good example. He rescues you from the destruction of Helgen, you both escape together, and then what can you do? Murder his family in Riverwood and proceed to kill him as "thanks" for saving your life. I'd say that's a lot worse than shooting your son, a potential psychopath.
Second of all Skyrim has a lot more opportunities to be evil. Sure some quests are tailored to just be evil and there's no good alternative, but in a game where a lot of the quests are tailored to being specifically good, I don't mind that. In Fallout 4,
quest-wise, these are all the evil quest options in the entire game:
1. Sabotaging the USS Constitution
2. Not giving that kid in Vault 81 the mole rat cure (I'm not even going to go over the fact that apparently this cure is a "cure-all" for any disease ever, so if we kept it, why the fuck didn't we have the option to give it to Shaun and cure his cancer since Curie states it can literally fix ANY disease known to man? Ahem, anyway)
3. Allowing Lorenzo Cabot to roam free instead of killing him, and then become an immortal god by taking his Jesus Juice every week
4. Selling Billy into slavery
5. Telling Virgil, for no reason whatsoever, that you didn't find the super mutant cure at the Institute, upon which he asks you to put him out of his misery. You can't even do anything with the cure if you don't give it to him, so this is pointless.
6. Blowing up the Institute (not sure if this one should count either, since the alternative is killing the entire Railroad and Brotherhood)
7. Betraying that young guy in Diamond City into giving you the entire drug stash after you help him stop a drug raid.
8. Lieing to Moreno about who stole his drugs and then get paid by the father of the son you shot during the drug deal to kill Moreno. (Not sure if this one should fully count either really, considering Moreno's an evil bastard, and so is the father of the son you kill)
9. This one's a lot more grey (surprisingly) than it is good or evil but I guess I'll include it: Siding with the scientist living under Covenant and helping her continue her Synth checking experiments.
10. Making Mama Murphy OD
11. Convincing that farmboy to kill a hostage at the Forge HQ (and they all turn hostile on you regardless so really not sure if this one should count either considering the result is the exact same as if you'd let the hostage go free and there's no extra reward or anything)
And quest-wise, unfortunately, that's literally it. Those are all the evil quest moments in the entire game. Hell, some of those I listed may not even be considered evil by other people. Meanwhile in Skyrim I can list a lot of quests that have evil outcomes but also have good choices. The cannibal quest I keep bringing up is one of those. You can either join the cannibal cult or help a priest of Mara destroy the place. I could more or less attribute this to the fact that Fallout 4 only has 70 quests as opposed to however many Skyrim has, but honestly that just shows Bethesda's laziness considering Skyrim came out SIX years ago now. If you can think of more, kindly list them, because after playing through the game twice those are the only ones I found.
Sure if I want to run around like a chicken with my head cut off, eating people, killing everyone in the game, that's possible to do in both Skyrim and Fallout 4. The difference here is the fact that Skyrim at least has a tiny bit of thought put into an evil playthrough by making specifically evil quests and factions, whereas Fallout 4 has barely any.