I have recently began to drink coffee. My wife likes weak coffee but I like it strong. My problem is that we use 8 O'Clock coffee and it has this real bitter (acid?) taste to it right off the bat. I've read reviews on this coffee and it is widely agreed upon that it's a low acid coffee. What is it I'm tasting? I usually drink from a stainless steel coffee mug. The coffee is made with an auto drip Mr. Coffee (i know, I know). Would I be interested in Sumatra, Guatemalan, Colombian, or African? Any suggestions for a smooth, mellow, but strong coffee is much appreciated. Thanks.