A plain old $25 drip coffee maker. Probably 10-years old. I use it on weekends when my wife is home.
Though on weekdays, when it's just me, I just "nuke" a cup of instant coffee.
I will occasionally buy expensive coffee, but for the day to day grind, I just need whatever will get caffeine into my system quickly.
And despite being a multimillionaire, I can't justify the cost of a Keurig, which, frankly, is no faster than my microwave with instant coffee. And a whole Hell of a lot more expensive. Plus, as an environmental engineer, the environmental cost does not appeal to me- Keurigs are very wasteful.