My knee replacement surgery led me to give up my lifelong coffee habit. For a while. The nausea I developed from painkillers and iron pills made some of my favorite foods unpalatable: peanut butter and jelly, strombolis, and coffee. Just the smell made me sick. But I gradually got my taste for these back and just this week started grinding my own beans again. In the meantime, though, I developed a taste for tea.
Note on diet colas: Years ago I was a heavy drinker of those. I ended up with an oxalate kidney stone which my doctor said was a result of drinking all that diet cola. Stopped cold. Nothing hurts like a kidney stone.