These are the mods I use to make my copy of Fallout New Vegas look not like Fallout New Vegas.
Remember: if you have little experience in modding (or even DO have experience) I highly recommend reading EVERYTHING on the mod pages. They write down that info to help you get the game running, and after having nearly 60 crashes myself getting these mods to actually run decent, it's worth the time.
DA MODS
Enhanced Blood Textures for NV v2_22c
EVE - Essential Visual Enhancements
EXE - Effect teXtures Enhanced
lStewieAl's Tweaks and Engine Fixes
Nevada Skies - Weather Effects
New Vegas Landscape Overhaul Remastered
NMCs_Texture_Pack_For_New_Vegas
NVEC - New Vegas Enhanced Content
Rudy ENB for Fallout New Vegas
Smooth True Iron Sights Camera
Super Mutants HD - 4k Retextures
UIO - User Interface Organizer
Weapon Animation Replacers FOMOD
Weapon Retexture Project - WRP
Yukichigai Unofficial Patch - YUP
Other mods you NEED (not on Nexus)
New Vegas Script Extender (Basically required for all mods)