For me it's now. I have a job I love, my health is okay on the whole, I don't have to worry about periods any more and my marriage and sex life are ticking along nicely. If only my children would acknowledge the fact that they are now grown-up and need to move out things would be even better. The only clouds on the horizon are impending retirement and ageing, both of which I know I can't put off indefinitely, so I must make the most of now.