Hmmm. The word 'shade' seems to crop up a lot when you search pergola online. As I sat this evening having a glass of sustenance, I found that if I tilted my head to the right angle I could shade my eyes from the sun behind my 3" timbers. All was well as the birds chirped and my neck began to ache. But it was a delight, looking up at the sunlight shining through the opening vine leaves against a blue background.
But it's true, it does rain rather a lot here in Wales. The original intention was to build a roof so we could sit outside, cook and eat in spite of the endless rain. Originally I thought of large, clear sheets of solid polycarbonate but that was going to work out expensive, and alternatives either just looked ugly, or the uprights and cross beam thing that I'd built wasn't going to hold them up safely. If I'd been on UKW then I've have done them properly.
Then the vine came to the rescue. I remember sitting under a wonderful vine canopy at a wedding in France, maybe 18 years ago, drinking wine and talking to people and wishing we had this at home. Well now we have, albeit 3 days per year - once the vine's done its stuff.
Seriously tho, nothing beats the satisfaction of making something yourself, using it, and feeling happy. I've only really come to understand that in the last few years.
ps When the lad got back from his mum's (we share), he asked: 'So, what goes on the top of that Dad? Will it be a roof?'