I grew up eating a sort of reversed continental because that's how my dad eats (who probably learned it from his non-American grandparents). I actually switched to the American style while living in Europe the first time. I wanted to look more proper while eating, but I couldn't manage to switch the fork to my left. I now eat either way (left handed fork, right handed knife) depending on the meal. However, when I eat American style, I do it properly with my left hand (and napkin) in my lap.
It's not a big deal as long as you aren't looking like a pig or chewing with your mouth open. Really, it's not.
Interestingly, in Scandinavia, they often have late morning/early afternoon coffee where friends will come over and cakes and tarts are served. You are only given a small teaspoon to eat with, and you use that sort of American style to cut off bite sized pieces of your tart/cake/whatever. It's the same teaspoon you use to stir your coffee/tea. At first I thought it was just my host family, but after several coffee functions, I realised this was proper etiquette. I don't mind eating cake with a spoon now, and it actually feels a bit like I am having coffee in Scandinavia when I have it that way.