I've only ever played New Vegas, but loved it. I never got to beat it, though, due to my Xbox's disc drive dying. I miss it a lot, and would gladly play it right now if I could. I had utterly NO idea what I was doing, because I'm new to the series, but luckily my character had a crazy amount of Strength, Perception, and Endurance, as well as skill in melee weapons and guns. They were otherwise deficient and had absolutely no brains or people skills, but when I couldn't get my way with talking, my character was basically a Terminator, on top of a marksman. With a Super Sledge, they could easily take on a Giant Rad Scorpion. Although Deathclaws were their bane, and I could never figure out how to fucking kill them. I never made it to the city, so my weapons were pretty limited. But unless it was a Deathclaw, step aside bitches, I'm going to do whatever the fuck I want, and they can either let me or die trying to stop me.
Lonesome Road sounds familiar, but I don't think I ever did it. I did reach as far as Novac and took out a Legion outpost and found the big warehouse or whatever that had the skinless people. I also had a minigun from a Nightkin from the one Novac quest, though it stayed in my motel room because it was almost gone health-wise and had barely any ammo. I had also taken out the Super Mutants on the mountain and killed Tabitha, and I had found the one town that was completely consumed by radiation, if that gives a range of my whereabouts.
At least on the profile in question (there was a previous profile or two where I just outright killed everyone), I was generally attempting to be "good" and side with who I thought were the moral good guys. So I would help Goodsprings, whatever the name of the Super Mutant was at the base of the mountain, that kind of thing. I didn't know what I was doing and just kind of erratically wandered around, but would try to help out along the way. Besides just trying to eventually make my way to the city, I was hoping to become an NCR soldier at some point, though I was never really offered to be one of them, so instead I just indirectly helped them by killing Legion whenever I would see them, regardless of my official faction alignment. They seemed like a bad group of people, so that was reason enough for me to murder them and loot their stuff. I liked the NCR more because even though NPCs generally aren't fond of them, the way the story was looking it seemed like canonically, the NCR or Legion was going to take over the region eventually, so I decided to help the more "preferable" of the two. Although there was one skirmish where I was at the power station, and I guess the NCR decided I was "tresspassing" and started shooting at me, even though I didn't do anything to them. I killed the guards on the outside, but besides that, I was friendly to them.
That makes sense with the joining thing. I was like man, I've killed so many Legion at this point and still they're not even offering to let me in. And yeah, they did warn me, but I guess I figured they just didn't want me to go inside the plant, when I guess they wanted me to leave the area, period. I didn't think they would aggro on me by just wandering around outside, but then I just see red bars and gunshots start going off...then a bunch of NCR soldiers ended up dismembered, and let's just not go into it. I don't know who did that, maybe a bear or something came by and mauled them. But yeah in general I was trying to get into their ranks besides just trying to reach the city, and would even go so far as to sometimes wear their outfit I got from a dead body (the variant with the bandanna so my face was concealed) when near their encampments and pretend to be one of them.