Bags are easier but I prefer it loose.
My favorite is lapsang souchong--a black tea that roasted ina bamboo basket over burning pine where it absorbs the smoke--giving the tea a very distinctive flavor that I am utterly obsessed with. I love Russian Caravan too.
I use a pot at work but when I get low, I switch to an infuser or tea ball and make it by the cup.
The water has to be boiling though. Tea isn't good that hasn't been steeped in boiling water.