My motivations are primarily ethical and environmental, though I have grown more sympathetic to certain of the health arguments too. If it were ethically and environmentally acceptable, then I'd have no moral compunction about eating lab-grown meat (aka "cellular agriculture" products). But I don't "miss" meat, after about six years of (ostro-)veganism, so I'd probably only eat lab-grown poultry and seafood on occasion, and skip red meat altogether insofar as it has (according to my understanding) deleterious health impacts that poultry and seafood probably don't.
I probably wouldn't.
I have personally categorized meat, especially fish, into "eww gross" so I don't think I'd enjoy it and I don't really feel like I have a nutritional need for it.
And the thought of gristle makes me want to vomit.
I don't think I've missed out on anything by restricting myself to a vegetarian diet.
I kid!