To the subject.
I have my own top mods but they are not:
Better Cittie
Unique Landscape
Qarl's TP3
To say I never install those.
My ListOOO, MMM, Armamentarium & Artifacts
(usually I install FCOM without Francesco and WarCry)
All Natural
Windows Lighting System and Chemineys
Enhanced Economy
RL & Progress
COBL
Alchemy Advanced
Supreme Magicka & Fearsome Magicka
BTmod & Immersive Inteface (my own omod custom version http://www.zshare.net/download/778685865712fb5b/)
Stirk
Elsweyr Desert Aquequinna
Refscope (if not FormID finder)
Flying Camera
Tekuromoto mods (DS Less Predictable Respawn, DS Portable Sorters, DS Storage Sacks)
Map Markers Overhaul
Companion Share & Recruit
Companion Master
Body Mods (Usually I use HGEC + Robert Male v5 seamless)
Cyrodiil Travel Services
Best Tools:OBSE
Wrye Bash
OBMM
Fastexit2
TES4FILES
Oblivion Stuter Remover
BOSS
TES4Edit
TES4Gecko
TES4LODGen
TES Construction Set OBSE
FaceGen to Oblivion Converter
Map of Cyrodiil v3.52