I was a junk food slave...loved the worst foods possible...and you're 100% correct about your tastes changing. I was skeptical about this and thought people were just saying this...to motivate themselves away from unhealthy food...I thought it was purely Dumbo's magic feather. Nope...it's the real deal.
I still love and crave sugary things like donuts. Candy still tastes really good, particularly chocolate.
But greasy stuff and fast food are just not what they used to be. Tons of things I used to love have absolutely no appeal.
Example... I used to love lasagna. Now, if I had my choice between a plate of lasagna and a bowl of vegetable bean soup...I'd go for the soup every time. I used to love french fries. If I had a choice between an order of greasy fries and a baked potato with black beans dumped over the top with salt and pepper...I'd want the potato...with green beans and a side of corn on the cob. If I had to choose between an Egg McMuffin and a bowl of oatmeal with nuts and berries...I'd go for the oats.
I used to hate beans and fish. Love them now.
I used to hate sweet potatoes. Love them.
It's super weird. If I were reading my own words three years ago, I'd think I was delusional and making crap up to sound reformed. LOL. But no, very honestly...I PREFER a lot of healthier stuff and it's wonderful to finally WANT what's good for me.