I've been roasting my own coffee for a year or so now. It does make a difference in taste ... but I've also made a few that tasted nasty. I've been trying lighter and lighter roasts. Some cinnamon roasts have been ... interesting. We're so conditioned to the *$'s dark roasts that anything with a light roast doesn't seem to have enough body.
My favorite bean is Killamanjaro(sp?) Top AAA with a light city roast. As for blends ... I've blended that with Central American medium roasts and been pleased.
I use the original iRoast.
I brew my espresso and Spanish roasts in a stove top espresso maker (
http://www.coffee-makers-espresso-ma...so-makers.html)
For general coffee I use a vacuum brewer (
http://www.amazon.com/gp/product/B00...74415?n=284507)
There's a new kind of coffee maker out that I'm going to try. It's similar to the French press (
http://www.aerobie.com/Products/aeropress_story.htm).
The links above are for descriptions only. You might want to search for better prices.