It all breaks down to personal preference and motivation. If you feel like you can, and want to train every day, go for it. There are people out there who go training a few times per day, so I'm told. Generally I train every other day, because I like rest days, and I get discouraged by the distance to my training grounds. I recently got a training partner who is pretty dedicated to the idea of learning as much as possible before I go to college, so I trained three days in a row this week, without any real negative side-effects.
Bottom line, if you're fine with being tired, train as much as you want.
