My mate was in the army for a couple of years and loved it, it is hard work obviously and probably a fair chance of going away to fight somewhere at the moment. You probably won't want to bother buying a car right now if you do it?? Still when you come to buy one I think you can buy new cars without VAT, someone on the site mentioned I think?

Also you will probably come back witha fair bit of disposable income as yo won't need to spend much and will get paid not a bad wage.