I definitely think you should just do it. You are so lucky to have the lack of commitments, the money etc. Its something you should do at some point in your life and you should just do it now...otherwise you will always find some reason why you should put it off for the time being and then never do it. You will probably love it and worst case scenario if you don’t, just come back. At least then you won’t regret not trying it.
Whats the worst thats likely to happen a lot of my friends are settled or have mortgages or both so I have no one to travel with occasionally. As long as you dont go to Iraq or Afghanistan or somewhere war-torn
I took a career break two years ago and I've never regretted it. I was feeling pretty fed up in my job at the time and I was stressed out constantly. I actually fell sick with stress...I went travelling with my partner for a year, it's such a cliche but it cleared my head and got me thinking about what I wanted to do and how I wanted to do it. It's a simpler life with more time to think and reflect. Since I've been back I have a new career that I am happy with, have bought a flat and most importantly, the health problems and cabin fever have disappeared. It's not for everyone but for me it was the best thing I ever did.