Into my 27th year (in two Forces) and after a last minue change of heart and the offer of another overseas posting to a cracking job, I'll have about another 5 years to Serve.* It's generally been great but being nibbled to death is getting a bit tiresome - and a bit hard on the pocket.
Challenge over the next few years is to find a civilian job that's as interesting...
* subject to redundancy, of course.