6. He manages to make arguments entertaining.
Friendships aren’t perfect and, even for the closest of confidantes, you’re bound to have a few disagreements. Thankfully, most arguments with Sheldon induce more laughs than rage—especially when he tries to one-up you with comebacks like, "I'm polymerized tree sap, and you're an inorganic adhesive."
Friends who fight and laugh together, stay together, right?