I chose Germany, Italy, and Russia.
Germany because it is the country I played in my first ever game of Axis and Allies (which was Revised). I enjoy playing cat and mouse with Russia, and trying to keep them occupied to allow Japan can land the final hit to Moscow. And being able to take Moscow as Germany just gives me a sense of satisfaction.
Italy because they are always underestimated but can be a huge factor in the game with being part of a 1-2 or 1-2-3 hit on Cau or clearing the way for German tanks. That, and I just like bombardments…
Russia because you have a very clear goal: survive long enough to make a counter attack. You have to be very smart about what you build, since Russia is almost always the center of Axis aggression. I like building up a solid defense, and then shifting to an attack once the Western Allies can drain enough of Germany’s resources.