My rating would be as follows:
9.4 for Oblivion only, 9.8 if counting all expansions
+A massive world to explore
+Character Customization and many strategic approaches
+Combat system well implemented
+Atmospheric music which immersed you in the world
+Tons of quests
+Lots of variety, whether on enemy types, ambient, NPC
-Minor graphical glitches
-Easy difficulty overall
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
