I go to the grocery store twice a week. I've spent time in europe, getting groceries is not the chore it is over here. It's actually a lot of fun to hit 3 stores in 10 mins and be back in the apartment cooking dinner with absolutely fresh foods
I freeze a lot of food. For convenience and financial savings - buying meat in bulk really saves me nearly $75 a month (I eat a lot of meat). I also buy frozen raw prawns, shrimp and scallops. I dislike previously frozen fish, it makes the texture kinda mushy. I prefer fresh seafood, but only eat it once or twice a week.
But, I dont believe freezing food can change the structure of the cells or some crap and make the food unhealthy for you. And canned veggies, while they taste nasty, are actually full of more vitamins then most *fresh* veggies we get in the supermarket. Simply because canned and frozen veggies are canned or frozen at the peak of the season, whereas the fresh veggies in the supermarket are picked just before the peak and shipped for quite a long period of time... ever notice that most veggies in the supermarket have to be eaten within a day or two or they go bad?
I plan on growing some veggies this year to see if I can taste the difference. But its just for fun