I don't think you can put a definitive answer to this as every walk is different.
When I'm in the fells, then maybe reaching the summit is the highlight but there is so much more to a walk other than the highest point. Yes the pint or 2 afterwards is always nice but my walks don't always end near a pub or I have to drive home and as said before on a previous post, by the time you have got to the pub, the walk is over.
However, lunchtime is often a good time on a walk for me. Deciding where to stop, whether on a bench, boulder, under a tree, by a lake or anywhere where I know I can rest for 15/20 minutes. Tucking into some food and cake, taking in the views and forgetting about everything apart from the scenery......Perfect.