My wife has been veggie since childhood, so all the meals I cook at home have been vegetarian food years. About a month ago, I decided to join her, since 90% of my meals are already, and it was just restaurants where I ate meat.
It's not been that hard, although I do cheat and eat fish every now and then. Especially in Portugal, where 80% of the menus are fish.
The best burger I've had is the moving mountains burger from Hard Rock Cafe. I genuinely could not tell that it wasn't meat, it was incredible. Really delicious as well.