The fun thing about blending your own coffee is that you will end up with the perfect cup for you. Don't buy too much coffee at once; you don't want your beans to get stale, and remember, there are no definitive rights and wrongs here. Most coffee can be enjoyed unblended; And it's hard to go wrong as long as you are starting with fine coffee.
A staple like a Brazilian Santos, or a Colombian Medellin is a good place to start. From there, ask yourself what you like? If you want a strong, dark, pick me up, then perhaps a Java or other Indonesian bean... If you like light coffee with high acidity, then perhaps a medium roast from Guatemala or Costa Rica.
Arabica's from Sumatra have a heavy full body; combine this with a light mellow variety, like a Kona or a Mexican Altura, which is light bodied and fragrant. For an exotic and slightly bitter element you may want to add some espresso roast...To perk up your American roast try adding a little Vienna or French... Ethiopian coffee is exotic and pungent with a slightly winey aftertaste; try combining that with a Strictly Hard Bean from Costa Rica for a tangy and lively cup.
I guess what we are telling you is that the individual palate is as vast and varied as coffee itself, so take the plunge into blending your own beans and enjoy!
