What raid have you played in when it was current? (plz list the raids you have played for more than 60% of the duration of the tier)
From Wrath to today only raids
Personaly I raided
ToC
ICC
T11
Firelands
Dragonsoul
T14
ToT
SoO
all for more than 60-70% of the duration (took some break, 1 month in ToT, 3 weeks in SoO)