Well, sagewolf, it is best if you do not like fish because most of it is very contaminated with mercury. Unless you buy farm fed, which are given huge amounts of anti-biotics (not good).
Oh yes, I forgot to mention this when I said I ate seafood.
You must be VERY careful about what kind of fish your eating and where they're coming from.
The level of methylmercury is dependent on species, age of the fish, season, and the location they were caught in. Some are relatively safe due to short life cycles and a safe habitat. For instance, Northern Pacific Salmon are pretty safe since they not only have short life cycles, but the way the ocean currents move around Alaska helps keep their habitat well insolated from pollution.
Others should NEVER be eaten. Sharks, for example, have long lives so they have more time to metabolize mercury into methylmercury, and the range of their habitat is enormous. You couldn't pay me to eat shark meat, no matter where it was from.
But regardless, even with safe seafood you don't need more than a small portion once every week or two (that's what I do). You can get the nutrients fish have from other places, but it's impossible to find everything all in one place, in an easily digestable package like that. Also, certain arthropods are pretty much always safe.
One of the things people also don't talk about is the dyes. Pretty much all of them have demonstrably negative efects towards health, and most of them that are permitted in the US are either banned or heavily restricted in Europe. Most of them consist of benzene groups, which are usually shady in reaction mechanism pathways and can cause some collateral damage (benzene freaks me out, lol). And you'd be suprised how much dye is in food -- even when you buy beef at the store, it's not supposed to be that nice red color: a steak or ground beef should really look kind of greyish at that point. The meat packers dye it red so people will think it's fresh and buy it.
Not only this, but you have to be aware of all the other crap they put in food. My organic chemistry teacher was talking about his experience of working for the FDA, and apparently they figured out that ethylene dibromide was carcinogenic at the time. The problem was that ethylene dibromide was widely used as a insecticide in argriculture to keep beetles from eating potatos and such (and had been for the past 30 years), but it bound so tightly to starch that it was almost impossible to detect how much the farming industry had been putting in the stocks of food.
So yeah. Take organic chemistry and you'll never eat again, lol.