If it's pastured I have no preference and enjoy rotating variety.
In the US, finding pastured beef/bison/sheep is generally easier than finding pastured hogs and birds. If I have an itch for pork or poultry I'll get a lean cut and prepare it with a cream sauce or guacamole--the protein fraction is the same.
Lots of: urban hiking, cycling, sprinting
Lots of: fresh meat, seafood, eggs, organs, tubers, starch fruits, vegetables, meat fat, dairy fat, oil fruits
Some: cured meat, dairy protein, sweet fruits, rice, pulses, tree nuts, oil seeds
Minimal: soy, refined proteins, sugar, liquid carbohydrate, grains, refined oils, peanuts