I had to google Keurig but it seems like a budget Nespresso? You could just upgrade to Nespresso if you like burning cash.
You mentioned it but it's really a miracle of marketing that those companies sold people on buying coffee at such a price
the only setting it really makes sense is in offices (and apparently that's what they were designed for) because it produces much better coffee than the big vending machines at similar prices (0.30 euros a piece) for much less maintenance.
However Keurig and Nespresso do seem to differ in that Nespresso is better for making espresso (duh) and Keurig is more in line with more watery american coffee.
I wouldn't recommend either brand (and capsule coffee in general) in homes.
To come back to Tasty Meat's OP :
Espresso is a very strong, tasteful coffee served in a small serving (1 to 2 ounces). An espresso is made by water running through ground coffee at high pressure and high temperature. It's pretty much the "normal" sort of coffee you'll get in bars in some parts of Europe (Italy, where the first machines were patented, France and probably a few others in Southern Europe).
There's a ton a variations made using an espresso base :
- Ristretto, a super short coffee (Make sure to try that if you travel to Italy).
- Long coffee (more water passes through the coffee)
- A number of recipes with various quantities of milk (Macchiato, Latte, Cappuccino)...
The easiest option to make espresso at home is using a Nespresso capsule coffee machine but capsules are really not cost-effective. Otherwise you have a bunch of fancier options like the machine Premium Lager have but the device itself will cost 100-200$ minimum (and can go up to ridiculous levels, 5 figures and all). Unless you're really particular about having espressos, it's probably not worth it.