I wanted to quit computers several times but always gravitate back to them eventually. I even did a whole masters program in economics to find something different. I personally am just the type to cycle between workaholism and hedonism. After putting too much into work I get really appalled by it and need to spend time travelling and just generally living life. Every time I spend 6 weeks not working I have a burning desire to do and learn again. Maybe you just did too much. The hardships of travelling are vital for me because at first everything is so great and you really need to do it until it isn't anymore. Eventually you will long to get back to your passion.