It's neat reading this thread and seeing what people's responses are.
From my aspect I will drink diet once in a while. I honestly think regular and diet pop are both terrible for us, but that doesn't mean I won't drink it. I prefer regular, but don't like to make space for calories lol.
I do LOVE the carbonation feeling, so I actually enjoy seltzer water or club soda. So generally now, if I'm in the mood for some bubbly, I pick that up. (It's also a great mixer!!)