I think the "mock meat" trend is more down to being a product of marketing than anything else. And taking advantage of people's reliance on convenience. Really good vegetarian and vegan food is not that difficult to cook from scratch.
Some of the vegetarian / vegan meat products aren't half bad, but most are like eating overpriced wet cardboard. I've bought various on yellow sticker as I'm really open-minded when it comes to food, but the majority of the ones I've tried, I wouldn't have them again even if they paid me to take them away. I'd much rather have beans on toast.
Am a meat eater, but will cook whatever takes my fancy - doesn't matter whether it's got meat in or not. Last week it was a vegetable curry - which ended up being vegan, though it wasn't intentional. I just happened to have veg, pulses and creamed coconut that wanted using. This week it was vegetarian cannelloni with ricotta, walnuts and spinach. Tomorrow I'm cooking pulled ham hock in parsley sauce.
On the subject of cheap sausages, no, they're pretty *bleurgh*. But if it's dripping you're after...