I defeated Alduin
Completed Thieves Guild
Completed Dark BrotherHood
Completed Companions
Completed WinterHold College
Completed the Civil War from StormCloaks perspective
Purchsed like 4 homes now along with a zillion side quests................
Skill 100 on most skills, level 72.
339 hours <-------Played around 100 hours before I found out that leveling stopped at 80 therefore stopping my attributes...............

Is there any other majors I haven't done?

Done all the Daedric quests? Killed all the Dragon Priests? Found all the treasure maps, and their treasure? Dawnguard if not on PS3? Bards College?

Side quests, exploring every location/dungeon at least one time, Dawnguard (If you have it). For the most part the OP is probably done.