No particular order, but three of my favorite engines:
Aston Martin P1 V12 - holy sound, screams so smooth.
Dodge Viper V10 - child hood dream, unique approach to an exotic car
Jeep/AMC I6 - first engine I built, stroked to 4.6 over 4.0. Makes great torque for fun street driving. It sounds different from most anything.
As far as transmissions, I think you have to drive one in order to like it or dislike it. I like my AX15 5spd, but compared to most everything else it's just a truck trans, nothing to see here.
LOL at the OP. Drop your bias now and try to like automotive stuff from other parts of the world; it will be healthy for you. When you find you start to like other things, then revisit American engines. Not saying you won't like American engines anymore, you will just be better well-rounded and people will likely take you seriously. Yes it's true American engines (big performance ones, anyway) can be huge, simple and make huge power. Several of the newer ones are great and winning awards. But when you drop your blindness you will see there is something to be said for engineering rather than limiting yourself to muscle car engines.