there are many interesting side quests (not the radiant ones) that are well written.
Give me some examples.
Last Voyage of the U.S.S. Constitution, The Silver Shroud, Here There Be Monsters...
Last Voyage of the U.S.S. Constitution was mentioned in my review as "a rocket-powered ancient sailing vessel that was stuck on top of a building; the ship was manned by a crew of malfunctioning robots who spoke in funny accents and thought that the war with China was still going on. I briefly poked my head into a nearby building; it was a super mutant
slaughterhouse, decorated from floor to ceiling with hundreds of freshly dripping human livers and kidneys." I mentioned it to point out the silly tonal clash, but I'm happy to discuss the quest itself.
The quest is founded on a Monty Python reference and basically functions as a joke delivery machine for "goofy humor". In that sense the quality of the writing is subjective, but I found to be gratingly terrible. The gameplay consists of a couple of fetch quests strung together by jokes, although you at least get the opportunity to steal something during one of the quests, and you can choose between two endings. Structurally, it's one of FO4's better quests, but the "lol this robot crazy" style of writing was not what I would describe as "good".
By the way, Last Voyage also features that "repair the damage with an Int check or walk literally six feet to pick up the new cables" stat check that I got quite enraged about in an earlier section. They finally put a proper stat check in the game, and they waste it on
this? Come the hell on.
Same style of humor, although this time you impersonate a super hero and call people "foul villains" or "evildoers" in dialogue. You may find that funny, but I didn't. And of course the quest design takes the premise as an excuse to follow comic book logic, which isn't what I want from a good quest in the Fallout setting.
One of the best written quests, largely because the Chinese guy actually uses some Chinese words in dialogue. Still, the lameness of the "You have to go into the irradiated area and fight off all the feral ghouls to get me my plot item. I've been there before because I'm immune to radiation and the ghouls don't attack me, but I cannot help you because *waves hands* I have to do other things." quest conceit rubs me badly the wrong way. I think it was meant to be funny in a "This guy would be perfect to do this task, but he can't do it, so you have to, lol" kind of way, but I found that more stupid than amusing.