I do believe you are what you eat, but I think I differ from a lot of people when I say I prefer my food to be non-organic. With produce I can't tell much of a difference in flavor, but organic produce seems to go out quicker. Because it stays fresher longer, I'll always buy the "store-bought" produce, unless I can get it a farmer's market. That's my only exception.
Now when it comes to meat, fish and poulty, I prefer store-bought hands down. It tastes better, stays fresher, has better texture, and even looks better. I also know that alot of that is due to the fact that those animals are injected with steroids and lots of other fun chemicals, and I'm fine with that. I have several stories I could share with you about this, but this one I think will illustrate it best.
I worked on a horse farm for a woman who raised cattle as a side-business. It was only her and her son living on the farm, and to save money, she would always have one of the that she sent to the butcher sent back to her instead of to the marketplace. Unlike the meat that is sold in stores, the meat sent back to the woman was cut to her specifications, and then each cut was wrapped in plastic and paper and individually frozen. The cow was dead for maybe 12 hours before the meat was frozen. She had all kinds of cuts; roasts, steaks, stew meat, you name it.
There came a time shortly after she had her cows butchered when she had to leave the country for a short time, and I agreed to watch her son while she was gone. Rather than buying food for us, I used the steaks that came from her own farm. When cooked, the meat would tighten up, and eating it was like trying to eat a big lump of silverskin; absolutely the toughest meat I have ever eaten in my life. And not only that, but it cooked to a sickly grey color, didn't look good at all. The flavor of the beef felt diluted compared to what I got in the store. Even when I cooked the steaks rare, they were tough! And they were dry as well. The boy had never eaten any other beef in his life and went on about how this is the best beef you could find. So I bought a NY from the market, and cooked that up along with a NY from his freezer, and had him try them both. He loved the other steak. He was amazed at the tenderness and the flavor as well.
It could be that I've just had bad luck with organic foods, but I definitely don't want to be any part of it. Give me my chemically-enhanced genetically-altered food any day!