What would it be?
Even though I love fried chicken and ribs and bacon and prime rib and steak… 80/20 ground beef. No question.
You?
Easy, pork.
But if you mean one single cut of meat? Hmm…little more difficult, but I’d go pork shoulder. Great stew meat, great for smoking, you can grind it to use for sausages or pork patties, plenty of fat to render to save for other applications. You can cure the picnic part of the shoulder into hams. Good stuff, that there pork shoulder.
As for the 80/20 beef–why not just go for the chuck or similar? Then, you can grind it yourself when you want it, but use it for other things like pot roast and stews when you don’t.
Lobster!
Pork just because then I get bacon + gammon+ etc etc
Beef
If specific cut is required, porterhouse.
When I saw the title I was wondering if it would be cheating to pick “pig”: pork chops, pork sausage, ham, bacon… all from one magical animal.
If I had to narrow it down to one cut though, I’d probably pick filet mignon. Yes, I’d quickly get sick of it, but I’d be getting sick of filet mignon, peasants.
Cow.
That counts as one type of meat, right?
No wait, pork. Living without ham & bacon would be aweful.
Beef
Chicken.
That’s pretty much the only meat I eat anyway (well, turkey too … and seafood).
Beef. Sirloin, if you want me to be more specific.
=Sigh= But dear Lord, would I miss bacon…!
seconded - love a good porterhouse. But man would I miss bacon and ham!
Well, I was going to say fish, but I like how you think.
Much as I’m tempted to pick trout, since it is the fish I think I love to do the most different things with (broil, bake, fry, steam, poach, etc.), there are things I like to do with meat not as easily done with trout, let alone any fish. Although you can cure fish, fish bacon just doesn’t quite translate. :mad:
So I’m forced to go with beef loin. And no, I’m not gonna differentiate: I’m a pig, I’ll take the whole damn thing, both sides! 
Crab.
Without cow butter?
If it’s a single animal then pork is more versatile but if it’s a specific cut of meat then beef ribeye.
I’ve gotta go with chicken. In addition to all the Asian chicken dishes I love, there are fried chicken, chicken biscuits, chicken and dressing, chicken salad. I couldn’t give all that up.
(I sure would miss hamburgers and steaks, but those are occasional treats for me, really. I eat chicken most of the time.)
After much thought Ive decided to go with the Cow. And if I had to choose a cut it would be filet.
As much as I love Bacon, Sausage and chicken… there are fakies out there that could get me thru. And as much as a weak substitution Fake Bacon may be… you cannot attempt to fake a delicious rare cut of steak.
Brisket.
Another vote for chicken. I could live off that stuff in almost any incarnation. Yummy.
I’d like to say pork, but I’d run out of stuff to do with it pretty quickly. Chicken is easier for me to come up with stuff to make with it.
I might even lose a bit of weight after I got tired of eating chicken.