TBC - 8.5/10 (Was a fresh start for me, really felt the game was great back then, however didn't experience raiding at 70)
Wrath - 10/10 (I found to be pretty awesome from the lore to the raids (except the "Trial 3.2" raids))
Cata - 5/10 (Only good points for me were is that I liked Firelands and T11... Rest all I remember is QQ from players and rehashed "za/zg" and 4.3 "Failsoul".... also mogging was a nice feature)
MoP (5.0-5.1) 6/10 (I just didnt find dailies so appealing honestly and didn't generally like MoP at start with all the pandas thingy)
MoP (5.2-5.4) 8/10 (Gonna wait to see how 5.4 raid turns out to be and might give it a 9, really like how they switched back to the ally vs horde war and the thunder king)