FO1: Giant Mantises, because when i first played the game i got 1 square away from the vault and those bastards killed me
FO2: FRANK HORRIGAN
FO3: Ghoul Reavers
FONV: My own fatman+big boys

I can remember encountering a Reaver in FO3 at level twelve, yes level twelve. Thank god I had the Gauss Rifle and Clover was using Victory.

The real Enclave in Fallout 2, not the [censored]-brigaade from Fallout 3.

Fallout: None, really.
Fallout 2: Frank Horrigan
Fallout 3: Reavers
Fallout NV: Cazadores (in numbers)

Fallout 1 had mantises?

Yeah, I remember killing them by the hundreds to level up to try and fight the Unity. Went well until my computer shut down for no reason.

And I now respect Ulysses, he wasn't an enemy for me but he was a good ally in taking out Marked Men.

it most certaintly did

Hm... Must have forgotten about them I suppose. I always thought they were introduced in Fallout 2.

F1: Death Claws
F2: Frank Horrigan
F3:Albino Radscorpions
NV: Anything that wields a grenade rifle/Missle launcher. Ever since that patch the aoe is ridiculous.

If they are my enemy then I have no respect for them.

Well that attitude sir is most un-becoming of a gentleman.

You can respect your enemies, I don't like the West Coast BoS but have some respect for their willingness to go down fighting for their beliefs.

I don't really like the BoS that much, but they aren't my enemies, sure they sent me to die in Fallout 1, but I didn't and got lots of gear, but I don't have much respect for them.

The Enclave I have no respect for, why should I? they're Nazi's, they want to end all life the deem not pure.

The game has more than two factions that could be considered antagonists? Niether of those are the primary antagonist in New Vegas for example.

I wasn't talking about that, I was talking about respect, and 2 examples of that.

Fallout 1: Super mutants with rocket launchers

Fallout 2: when im not with companions, Deathclaws. But Wanamingoes were crazy and horrific haha (I'd love to see me again haha)

Fallout 3: nothing after I got the dart gun. After that nothing was a problem.

Fallout New Vegas: the Deathclaw alpha male, mother and the legendary one were crazy haha

I only play f3 and fnv so here

F3 super mutants behemoth

Fnv tunneler

Btw reavers are easily to kill in the tunnel sentry bot though... Not so much

I cant respect animals for being foes, they do not train or eat healthy or do anything to be like that. they just survive. Anyways i can say that the Casadors were anoying as [censored], and the deathclaws were the real deal, fun to kill and even just fight. died a few times

I respect the NCR rangers. Even though they fight for NCR, they still are great and respectfull oponents.

PEACE Y′ALL

Fallout 1 - Supermutants (Just started the game recently so this is subject to change)
Fallout 3 - Overlords. Reavers became easy with the paralyzing palm perk
Fallout NV - Green geckos, the larger ones.

I respect and fear Deathclaws. My AMA however says otherwise.

I'd love them even more if they were intelligent or at least didn't attack you even if you were not in their path or near it.

The germs, they are quite unpleasant

_{F1: Haven't Played
F2: Haven't Played
F3: Though the Deathclaws gave me a scare at first I got over it. I fear and respect Liberty Prime. You mean if it went to the Enclave's side it would be like coming out of Vault 13 and fighting the master instantly. even if you were in Hellfire Armor and flying with a Vertibird with a Fat Man you'd die against Liberty Prime. Actually.......
Message To All F3 PC Players. I need you to try to fight Liberty Prime unmodded. I'd like to see that fight.
F:NV: Deathclaws, Cazadors, and the Legate. And the one i fear the most if the Cazalegateclaw.}

1 The Enclave

2 The Legion

3 Big ass mutants

4 The Enclave and BoS becoming one new group together a new force to deal with

F3: The Reavers.
FNV: Tunnelers, Cazadors and viper gang members at low levels.

Pre patch cazadores from NV.

In a gameplay sense, I fear Deathclaws and Cazadors currently.

Previously, I feared the Brotherhood of Steel and the super mutants. Funny story, actually. The box art of Fallout 3 is a BoS member, so it was obvious that they were going to be a huge part of the game. The opening cintematic lead me to believe they were bad guys. You know, the whole destroyed city, and the creepy looking guy in power armour who causes the screen to go black as he looks right at you? Then when I was exploring in the outskirts of the D.C. ruins, I encountered the Super Mutants. I almost got destroyed. Now I know that's because Talon Company mercs were fighting me as well, and that Super Mutants are actually really weak.

Some a roleplaying point of view, I respect the NCR. I don't fear the Legion, or House, but I despise them. Actually, I respected the NCR under Tandi's rule. The state of the NCR in New Vegas isn't something I support: imperialistic, greedy, etc. Kimball's leading the NCR to its death. Even when role-playing a NCR soldier, I would be okay with letting Kimball be assassinated, if it would cause a huge drop in morale. I can't sympathise with him at all, he's greedy.