First mod I made was a personal bare-bone companion. Unfortunately, he become more annoying than useful. :C

First downloaded was unlimited companions. Couldn't stand leaving Boone or Veronica by themselves, now with all the modded companions, I've basically locked them up in the lucky 38. I mean, they ate all the chips. They deserve it.

my first mod was a simple cowboy hat mod for Fallout New Vegas. It took me over 3 hours to figure out where to put the files and probably twice as long to find it in game!
(Haha I know, I know... I'm new to modding. Much better now though!)

Staff edit: merged your two posts since they were back to back.  Please edit the previous (first) one if no one has replied.

We talking about first mod downloading or made?
First mod I downloaded was Project Nevada and It was pretty well done I outta say.

And first mod I made was The metro 2033 Breathing affects.
(I would say Silent hill 3 UI or the menu changer but the menu changer anybody can do and silent hill 3 UI someone had a simular idea to mine.)

https://www.gunetwork.org/t7795-metro-2033-breath-death-affects

Mine was a self-made mod for Fallout 3 to change Clover's awful hairstyle.

For me that's reaching a few years back...lets see, when I started modding fallout new vegas I actually got a bunch of mods all at once. So my very first mod out of that group that I installed was the Mod Configuration Menu. The first mod I installed that actually added new things to the game however was Project Nevada. Though that's just for new vegas. Very first mod ever was the ultimate 3rd person camera mod (I think that's what its called) for Oblivion.

Mine had to have been New vegas bounties, I First got New vegas on PC after seeing a modded playthrough and realising how much extra content could be added. As I preference quests over armour in terms of gameplay, it just felt right. As of this moment, I have not touched my 360 copy, and I don't regret the jump.

My first ever mod was some weapon for Oblivion. Didn't play that game much, but got hundreds of various mods for the game, until I bought FO3. For that game I got the Enhanced Children first I believe, though again it could have been a weapon mod.

Then I bought FONV and the first again was CoTW, together with MCM. The first mod I made for New Vegas was an underground vault home for myself - wasn't too bad but very basic and I was only starting out with the GECK. These days I make tons of mods with assets from everywhere I can get my grubby paws on them and have cluttered my world with them endlessly! ^_^

playable dremoras for oblivion

For me,it was weapons of the new millenia.
It was an epic weapon pack.

btw it's for NV if you haven't noticed yet,bruh

Personal Vertibird for Fallout 3. I thought it was the greatest thing ever, and then I discovered Cybernetic Dawn...but that's a story for another day!

This sure bring back memory of my first dowloaded mod on nexus back in 2010.
This one:
http://www.nexusmods.com/newvegas/mods/35143/?
Millenia was alway my fav modder.

My first mod is a zombie apocalypse mod in fallout 3.

First mod I ever installed was an M4 or M16 for fallout 3. I didn't play that much yet so doesn't really matter.

First mod I downloaded when I really started to get into modding was Darn UI for New Vegas. First mod in Gophers how to mod New Vegas series

It was a mod for Skyrim, the Elite Knight armor from Dark Souls. Then I was still a real noob for moding.

I think it's kinda funny but for Fallout when i played it the first time I got Nevada Skies.
:'D

considering my first Fallout game for the PC was New Vegas, i missed out on quite a few awesome mods from Fallout 3. My first ever mod was probably the HD retexture of the Ranger Combat Armor before the mod became ADAM. Don't worry, i've experienced many epic Fallout 3 mods as of today

Mine was "NMC's Texture pack" in Fallout New Vegas.
Because after several play troughs i needed a change

my first mod was project nevada

Recolor of a few armors for Skyrim.

If I remember correctly, it was the Modest Knight set for Fallout 3.

My first made for Fallout 3 was a a mod that buffed the American assault rifle and horrifically nerfed the Chinese one, along with buffing the PA to be useful.

  The first I downloaded was The Impervious Power Armor mod (Looks like fallout 4 is going to need this again).