Some bits, yes. Had some very bad bits, gone the wrong way, made bad decisions - but from where I am now all the old sayings seem to ring true.
I am now happy - yes there are family problems, money problems etc.. I You appreciate the good because of the bad. I've made mistakes, one serious one, but I paid the price and sorted it out and I'm a more understanding person because of it.
I would like to have another go at the middle bit of life - armed with what I now know! - but that is impossible. I suppose the answer is 'yes' - I know it has been a valuable life which has helped people and that is my main measure.