Also, I definately recommend getting Oblivion Script Extender and Oblivion Graphics Extender. That way you can run some of the more advanced mods...
Also, grab these....
Landscape LOD mod
CapNkills Non-tiling texture mod
DarNified UI *much improved UI
DarkUI (darkens the UI)
Atomosperic Loading Screens for DarkUI
Rens Beauty Pack
Arcane University Addon
Most other stuff is about Armor/Weapons/Items, gameplay, quests, etc. Thats up to your personal taste.