I went down the coffee rabbit hole a couple of years ago. Some strongly held opinions:
1. K-Cups, like timeshares and MLMs, are a huge fraud perpetuated on the American public. The coffee is terrible and ridiculously expensive. This one is actually not an opinion, it's a fact, based on how to correctly store beans/grounds and brew coffee. K-Cups are terrible. Please don't buy one of those stupid machines. I'm hoping people will wake up and stop with the K-Cup madness. Landfills will certainly be a lot happier.
2. Aeropress. Get one, along with an electric kettle. This combo makes way better coffee than a K-Cup and is a great, cheap, effective way to brew a single cup of coffee.
3. But we use a big, stainless steel French press because we coffee for two every morning and I happen to love French press coffee. I love the coffee bean residue and the foamy stuff at the end. Yum.
4. Super expensive beans...I don't get it/am too cheap for it. I'm actually a little annoyed at myself for liking Kirkland House Brand over Folger's. Freakin' snob over here. I mean, I like cream and sugar so in the eyes of true connoisseurs I murder my coffee anyway. To me the Kirkland House Brand is just fine. I have a fancy Baratza burr grinder that I got from Craigslist for $70 because my old blade grinder was a big hassle to use. I know I could grind a whole bag's worth of beans at Costco, but I have two toddlers and both of us work full time so: no time/no patience for an extra step at Costco. My big burr grinder makes short work of a formerly very annoying task. People say it's this huge imperative to have a burr grinder but I'm really just after the convenience and haven't noticed a difference in taste.
5. For work, instead of the Keurig machine:
https://www.amazon.com/OXO-Single-Coffee-Dripper-Auto-Drip/dp/B01ENK41Q6 this thing is very handy and I am the envy of all the other teachers, who frequently borrow my little rig. Even cheaper than the Aeropress. I prefer it for work because I don't have to babysit it at all while it brews. Also, I didn't want to buy another Aeropress (we need the one we have at home for various circumstances) and this thing was cheaper. I highly recommend it.
Coffee is a necessity in my life at the moment. I kinda wish it weren't and look forward to life slowing down a little at some point in the future so I'm not quite so dependent on a stimulant. But here we are.