There's a lot of science fiction that delves into this. I recently read The Commonwealth Saga. It has this type of technology in it.
To answer your question, I think it is entirely dependent on personality, culture and the availability of food. An athlete that was raised on healthy food and has access to healthy food all the time probably wouldn't eat junk very much. Some people get their kicks elsewhere. But there are some people who absolutely love food and that's how they enjoy their free time.
With that said though if we had technology like this we probably would have the tech to simulate popular textures and tastes in healthier foods. Look at what we've done in the past 100 years to make our food healthier. We tend to focus to much on negative, but we've made a lot of positive advances. Most of those advances are just in the variety of fresh food that is now available to us. This is true in most modern areas of the world, but there are still many where it's not though.
Given the choice I think most people would not eat themselves to death. It would get old pretty fast. Risk taking is a different story though. I could see a lot of people taking much bigger risks as entertainment. Although that would fall largely along personality lines as well. At some point most people get bored and try something new. If you're living super long lives, upping the ante every time, you'll eventually get to some pretty crazy stuff.