I liked diet soda better than regular soda. I'm not really a "sweets" person though so that's probably why. I would have a couple of diet cokes a day and then a little over 7 years ago, went cold turkey. I've only had 2 sodas in 7 years. Had a sprite/7up/Sierra Mist for a upset stomach at the Canes game about 3 years ago. Had a Diet Coke when driving back, from NY because the place had no coffee. That's it.
Of course, I drink 4 cups of coffee each day (used to drink 1-2 before). We brew it at home and it's 1/2 caf. I have 3 in the morning and another after lunch, and I take it pretty much black. No cream and maybe a quarter tsp. of sugar in the raw. I drink a ton of water now also, which takes the place of the sodas I used to drink before.
The main thing I've noticed...much less acid reflux after giving up soda, and I'm saving about $1000 / year because both my wife and I gave up the soda and we were each drinking 2 / day. The cost of extra coffee is minimal since we are brewing our own.