COKE!!! Oh all the way coke. I was raised in a coke-oholic family.
You know how most people drink coffee in the morning? Not us - we drink coke.
Pepsi is too sweet and doesn't have enough carbonation. Like a PP said, tastes flat to me. I hate going to restaurants and asking for coke, then getting pepsi. YUCK! It's happened too often that if I don't know I ask before ordering...
Now that's not to say I hate other sodas made by pepsi. I'll drink mountain dew or sierra mist. Depending on how jacked up I feel like I need to get.

But pepsi it's self? NEVER!