I also roast my own... usually pan-fired. I've done barley alone, and also mingled it with toasted rice. I recommend if you roast your own, you do the barley separately from the rice, as they don't brown at the same rate. I have had some results that were over-browned, especially when using long grain wild rice. I personally like the combination of grains but barley alone is very tasty. I also find that it reinfuses very well... I start mine with hot water and grain... let it sit for a few minutes to start the brewing, top it off with cool water, and stick it in the refrigerator. After each glass I drink, I top it off again with water... and the same couple of tablespoons of toasted grains are good for several days this way.
I like it warm too... but drink it chilled more often than not.