Absolutely nothing worth buying at the prices being offered.

Bring back the sales that offered a free title at different thresholds of spending.
Spending x amount of money opens tier one free game, spend an additional amount of money opens tier two free game and so on.

Already own it.

I'm just a bit miffed that Greedfall Gold is slightly more expensive that it was last time.

I passed on it then, but got convinced shortly afterwards that it is a cool game, so decided to wait for the next sale... which is worse.

OTOH, I believe this is a new low price for Operencia, so I might jump on that one this time round.

You own about 1678 games and GOG has about 3555 games in total. When you own approximatively 47% of what's in the whole store, there's not going to be much you don't already have. If it makes you feel any better, you're not the only one in the same boat. Bethesda started offering worse discounts around the winter sale and this has yet to change.

My only complaint with the sale is that it's not marking as owned The Witcher 3 and DLC when I already own them as part of the GOTY edition. There's nothing that interests me, but at this point my wishlist is so massive that there's basically no point in checking out the sales pages.

Update: two games off my wishlist were added as part of a "flash sale", so there was something for me after all.

Exactly! Some years ago, whenever there was a sale, I'd always get some great deals on discounted games.
Now, when there's a sale, I already have all of the the discounted games. Meaning that I'll have to wait some years until bigger discounts are available.