I know some people don't like it, but I only drink diet cola or sugar free energy drinks.
Oh yeah? What made you choose diet cola over regular cola?
I don't know. I grew up with a mother who often drank diet cola, and she made me associate the stuff with her.
If those are your drink preferences then there is nothing wrong. Though diet cola can still be unhealthy, you can drink in moderation without problems.
I just know I feel better when I'm drinking diet cola.
It's nice that diet cola makes you feel good, but it's best not to drink it too often. Even though there isn't any sugar in it, that doesn't mean it's healthy.