Temple of Trials, Vault 15, getting the water chip, the Glow for the BOS, clearing out the tanker could even count, etc. Just off the top of my head in 3 seconds. Tons of times that you had to 'dungeon crawl'. Skipping content doesn't really count.. and you can do that in FO3 to some degree as well.
I was really only talking about F1... F2 was heavily criticized exactly for that. They added too much content without giving it as much depth as in the first game.
-Vault 15: Not really a quest, more like a red herring for the real quest (find the water chip), but okay, I'll abide that one.
-getting the water chip: How? I suppose Necropolis' tunnels were dungeon-ish, but that's not enough to make it a DC (you don't have to fight there, just pass through). To get the chip all you have to do is convince Harry to let you pass, repair the pump, and get the chip in the vault. It could turn into a DC if you try to steal the chip, but again, that's optional.
- the Glow: How's that a DC? You climb down the crater, go to the BS corpse, take the disk, and get out. It's pretty straight forward, really. All in the first level (almost at the entrance), no enemies, just a couple of traps.
IMO, you seem to be misunderstanding what a dungeon crawl really is. The 'crawl' implies you're struggling with enemies at every corner, so you finally reach your objective at the far end of the dungeon. Simply there being a dungeon, or doing something in a dungeon, is not DC if you don *have* to fight enemies a good deal of the time. If there's nothing to molest you, then there's no crawling, so to speak.
As for skipping content not counting, I don't agree with it.Mostly because I don't think it is skipping, really. You're just taking a different route, which happens to be shorter. EG if you are a char\speech based character, then you use your abilities to take the diplomatic path, and fool your enemies into taking you where you want to be. But even if I accept your view, for the sake of argument, you still don't have to skip. You can eg disguise yourself as a COC member an simply walk all the way through the base or the LA vault, and during the way having a completely different experience compared to simply figthing (or crawling) your way through. Like talking to the enemy NPCs and even talking them into giving you things and helping you. In F3 you can't play that way, because it is completely combat-oriented. It basically puts a gun in your hand and tells you "go crawl that dungeon", "use it or don;t play". Or rather, "use it or play in completely ridiculous way, running around getting shot from all sides and spamming stimpacks".
As far stuff in FO3.. maybe the whole android quest? Stuff in Tenpenny tower? Lots of unmarked quests in towns as well (stuff that would have shown up in the pipboy in FO 1/2).
So, while there are plenty of ways the games differ.. making this one some stickler isn't the best avenue to take imo.
-the whole android quest: you have to crawl through the mirelurk-infested broken bowl
-Stuff in Tenpenny tower: you have to crawl through the metro tunnel to get to Roy
BTW, I wasn't trying to argue F3 was worse than F1 because of the DC, I asked because I was genuinely curious since I really could think of any non DC quest in F3. But now I do remember a couple, which incidentally (or not) also happens to be one of my favorite ones: The power of Atom, and the vault 112.