I'll have to go with Rose Cassidy. She's a keeper. I like several characters, but I'll stick to this.

I would have to go with Dogmeat in both F3 and F4 he's just to cute. Plus he reminds me of my dog so he just is a complete must for me. Who doesn't want the mans best friend to follow you through the irradiated wastes?

Make fun of me if you want but my favorite is Paladin Danse,

Spoiler:

raul he probably one funnyist companions in series and his repair skill very useful

My favorite character from the fallout new vegas is Sunny Smile, she is the next person on the doctor who helps us find at the beginning of the story

If we are talking "standard" companions, my favorite has to be Kate in Fo4. Love the accent..

If we are talking modded characters as well, its a tossup between Willow and A.R.E.S. (although Kate would be in that mix as well...)...

For me:

Fallout 1: Harold
Fallout 2: Marcus
Fallout 3: Three Dawg
Fallout New Vegas: Raul and ED-E

Not yet played Fo4, so I can't say for that game.

Never played the first two Fallout games or Fallout 4, But I can safely say my favourite character in Fallout 3 is Three Dog, just because he's such a saint, in my eyes. For New Vegas, It'd have to be Boone, I don't know why, but he was just likeable to me, I guess the cold, long ranged murderer vibe rubs off.

Benny, ring-a-ding-ding baby!

This might sound weird, but one of my favorite characters in new vegas has to be rex, I know he doesn't talk, theirs just something about him, I mean I grew more attached to rex then i did dogmeat in fallout 4.

This is a hard one. I guess it's so much easier to decide who I hate the most rather than who I love the most. I guess I'll say Craig Boone. He's my go-to companion in New Vegas because he's such a bro! I got him as a companion every playthrough of mine. I always did NCR anyway, so that helped. But I remember one time I did the Yes Man ending and I garnered too much hate from the NCR, so he left right in the middle of the Battle of Hoover Dam. I don't know what came over me, I guess the thought of Boone leaving me was too much to bear, but I shot him. I regret it to this day and I never did a non-NCR playthrough since.

I'm going to have to say boone, only companion I ever cared for, or hanged around with for the whole game

What's this? No Frank Horrigan? Easily the most difficult boss fight on the face of the planet? Punches a deathclaw into mush?

@OverTheTop123 Well, sure, he's a total badass and I respect him. But it's rare to love the antagonist in many cases. Especially one as difficult to beat as Horrigan. But I guess it'd make sense, from a gamer's prospective, to like a character strictly for how badass they are or how much of a challenge they provide.

I'd say Dogmeat cause he's always been the cutest dog character and he's even in fallout 4, he's that good also he can help you find ammo and stuff for you