What is your favorite MMORPG?

For me its kinda hard OSRS, Runes of magic, RIFT before it went free to play, defiance, WoW Vanilla, WoW WoTLK, WoW BC, Trove before some crappy updates, maplestory befor black mage update, Dragon nest, Vindictus, and allods online. I had more but its kinda hard to remember all the ones i enjoyed playing. But my favorite out of all is WoW Vanilla.