French press at home, with either Sumatra Mandheling or Colombian beans that I grind myself. For real coffee connoisseurs, I strongly recommend Monmouth Coffee shop in London. If you like cheap, milky coffee with loads of sugar, don't bother going.
I'm not a fan of Starbucks. I find their drip (filter) coffee sits too long and tastes burned. Out of the places I've tried in the US, Grumpy Coffee in NYC was my fave. Petite Shell on Lex, around 84th, was rather good as well. Recommendations for future trips to Boston are welcome.