Tony hates nicknames in general, but he doesn't mind being called Tiger by Chris cause he says it ~means something~ (no, I didn't ask about that). In the HSAU his friend Rosh (Rochelle Lamburg, the photographer that took those pictures of him for Caroline) also calls him Chopper, and he gives a token protest every time. But she only exists in that verse. Also, in my head Vivi calls him Christopher in the game we did where they were together on Earth.