I browse mods a lot and I'm tired of seeing the same old suggestions,  lets talk mods that you feel don't get their due time in the lime-light.
To be clear, I'm not lookin' for the stuff you see on the front page of the Nexus and I am looking specifically for FNV mods. Tell me about mods that you personally love but aren't necessarily well known or used. Shoot!

Animation Project
Lazarus Project

Those two definitely need to have over 1k endorsement for how much they contribute to the "FPS" and realism feel of Fallout NV.

***Make sure you have JIP LN NVSE Plugin, because these mods require it.

Anything by miguick
Anything by Rowd
Anything by sandbox6
Anything by Yukichigai
Anything by Machienzo
Anything by KiCHo666
Anything by DevastatinDave
Anything by kotlecik

Better Mr. House Ending (Does not change the Mr. House ending, just improves the look of the background securitrons)
Barton Thorn Acts Normally
Hack Festus
Keep Collecting Those Sunset Sarsaparilla Stars
They See Me Bedroll-ing
Corpse Equip
Improved Ranger Coats
Better Lonesome Road Riot Gear Coats
Real Bunk Beds
Faction Armor Redone
Autowalk Improved
111777's Silent Player Voice
No glasses Facewrap bandana and Vexillarius helmet
harder final batte hoover dam enhanced (don't use on slow computer)
Extended Dialogue - Vulpes Inculta
Music Recovery
Sheriff Meyers
Caravan Card Control
NCR Salute
Better Repair

We are living in a Nuclear Wasteland right? So why not make the moon look just like that too. I love this little moon texture.
Busted Moon

This mod replaces every in-game chems and changes their attributes.
Hardcore Drugs

Generally I think under 10k downloads are underrated, but here are some mods which exceed that number, since they should be more popular in my opinion.

Similar to hardcore drugs, adds a lot of real life stuff (drinks) to Mojave.
Real World Drinks Alcohol Addon

For Legion playthrough this is a must.
Legion Quests Expanded

No hitscan. Perfect mod with Real Recoil and Realistic Weapon Damages.
Precision Ballistics and Munitions

Death Alternative Debuff

I really like this mod for some reason. Especially on hardcore difficulties

These mods are great guys! I'm especially a big fan of the Death Alternate Debuff, Precision B&M, and Hack Festus.

I've found a couple of my own, too, like Near Death, Immersive Karma, Make and Break Cases, and Realistic portable tent.

Keep em' to comin' lets get more of those mods the attention they deserve!

this list needs

Arwens Tweaks Patches for DLCs and Other Stuff -Unofficial-

IMPACT

and
True Wasteland Economy 1