When mine first started laying, I didn't have enough of my own to keep up with our needs, so I still had store bought eggs. I compared them like one of the above posters, and noticed as well that my yolks were a nice color, the whites really white, and that mine stood up in the pan versus the store bought ones. When tasting, I saw that mine were much richer, but besides that I didn't really notice a taste difference at the time.
Now that my hens are in full production, I haven't needed any store bought eggs but a family member brought some home and I decided to cook them up so they wouldn't go to waste. That is when I really noticed the difference in taste from solely eating mine for so long. As I stood over the pan making scrambled eggs, the smell wafting up was unpleasant to me. Eating them wasn't really good either - didn't have much of a taste at all.