What game can you play over and over again and not get tired of ?

Garry's Mod. Been playing for 7 ish years and have 7000 hours. World of Warcraft too. You can always choose a different questline to do for any characters while leveling up, as well as different Races and Classes. Hundreds of different realms to play, like PVP, RP, Normal, etc. Tired of that? Play Classic and hopefully soon The Burning Crusade official servers.