I prefered "Make Love, Not Warcraft." Even though I'm not a huge World of Warcraft player myself, I still think it was a pretty entertaining episode. "Good Times with Weapons" was also fun but I think I enjoyed it a little less.
Tough one! Went with Warcraft, basically cos the way they treated Butters was terrible in Good Times with Weapons. I felt so bad for him. Both are epic episodes. Warcraft has the boys all getting fat and Cartman shitting onto his mom at the computer!