Well, my eating habits are some kind of mutant spawn of both styles.
I’m right handed, and as a kid, I was of the theory that the fork was ALWAYS in the right hand, so when I was old enough to start using a knife, I used it in my left hand and always had the fork in my right, opposite of the Euro style. However, my mom, who’s mother was quite the etiquette queen, chastized me and told me I had to switch when I cut the meat, then switch back. It took me a while, but I learned to do it this way (I might add, it was the “full-fledged” American way, wherin I would switch to cut it, then switch back to bring it to my mouth.)
In high school, I did the “lazy” American style, where I would switch to cut it, but keep the fork in my left hand when I brought the food to my mouth. If I was eating something like steak and potatos, then I would usually eat a few bites of steak, then put the fork in my right hand, then eat a few bites of mashed potatos.
Nowadays, I’m closer to full Euro, but still have American inklings. I will start with knife in right and fork in left, and cut off a piece and eat it, and usually in between pieces of meat use my fork to grab some taters or vegetagble while still in my left hand. If, however, I finish my meat first, I will switch back and have the fork in my right hand for the rest fo the meal. Also, if the meal only needs a fork (say, salad or desert) then it’s in the right hand.
I will also add that I cut mt meat the “Cosmopolitan” style. Which is to say, I cut off a medium sized piece of meat, then cut off bite sized portions of that to eat. I have heard the “American” style is to cut up all the meat into bite-sized pieces, then eat them. This makes sense when you think about it, since if Americans have to switch to cut and eat the meat, then to make it as effeicient as possible, all the meat is cut at once, so there is only one switch. The “European” stlye, as I have heard, is to cut off a piece then eat it.