The way your meat is raised makes a big difference in the quality of the final product, factory raised animals and things like eggs do not have the same balance of omega 3 to omega 6 fatty acids.
Feed them what nature intended and the end product is superior.
Our pork is pasture raised and grain finished... chicken and eggs are free range, and our beef is grass fed.
We add as much wild meat and fish as possible to our diet taking into consideration the possibility of contamination in fish stocks... our local lamb is also very good.
Farmed fish has a less desirable ratio of Omega 3 / Omega 6 because of the commercial feed that is provided... Tilapia is really tasty but is one of the poorest quality fishes as almost all of it is farm raised.