Permission, please to comment and then hopefully seamlessly shift into another take on this theme/meme.
Firstly, I've probably played more 19th holes in serious (i.e. something that really means something to somebody and is played under the supervision of a Committee) competition than most of the people on this site (my number is 5). I guess this, as few people outside of the Commonwealth (90+% of this forum) play serious competitive match play, and even when they do, hell they don't even go down the 18th in the Ryder or President's or Curtis or Solheim or Walker Cup's!). Given that, MO is
--19th holes suck, whether or not you have got there by winning or losing or even halving the last hole. You are butt arsed tired, but you at least another hole and at worst another 18 or 19 or whatever. Chinese water torture is like lying on beds of asphodel with 72 virgins in tow in heaven compared to going down the 19th towards
--the further you go from the 19th tee, the further you go from the clubhosue, where your friends and your fellow competitors and pints of Guiness or Beer or Lager or Cider or even Coca Cola await
--even if you win, you are knackered, and very unlikely to win your next match.
So......
.....the best 19th hole is in the clubhouse, any chubhouse, IF you are joined by true friends and worry about the golf only outisde of its contribution to the common banter.