My Keurig because it's way cheaper than buying coffee every day.
This. Brand-wise, I prefer McDonalds and so do most people I've spoken to.
Keuirgs are horrible. You can make whole bean coffee that tastes much, much better for 1/3 the price. It's not like traditional coffee makers require an engineering degree to operate.
1/3 the price is no bargain if you only want 1 cup. The smallest non K-cup machine I've seen is a 4 cup machine. K-cups don't really compete with traditional drip coffee makers but with instant coffee. I drink at most 2 cups of coffee per day, so making even small pots of coffee makes no sense for me.
Instant coffee is disgusting. I don't know how people drink it. It seems especially popular in commonwealth nations.
If you drink (one) 6-8oz cup of coffee per day, then Keurig might make sense. But if you drink several cups.. or one at home and one on the way... then a drip brewer makes sense. The "cup" measures are for 6oz cups of coffee... not the standard 8oz size. So 4 cups is 24oz which is not that hard to drink if you take it with you in a thermos.