Anyone have a favourite wine cocktail?

There's the standard white wine spritzer, with white wine and some soda/sparkling water, but do you do anything more innovative?

I like red wine spritzers with red wine (natch) over ice, sparkling water, a dash of Grand Marnier (or other orange-flavoured liqueur) and maybe a splash of lime juice. Garnish with a slice of orange/apple/strawberry.

I also like sparkling wine with fruit juices or a mix (ruby red grapefruit juice plus a bit of pomegranate juice is a nice rosy colour and not too sweet). Fresh mango juice with sparkling wine over ice is very nice, also, with or without a dash of lime juice. On Kauai, I buy guava juice from Guava Kai and mix it with wine and serve on ice. (The guava juice in the stores is usually too sweet.)

Instead of Kir Royale (champagne with crème de cassis), I keep thinking I'd like to try a simple Kir - a tsp or so of crème de cassis in a champagne flute and then topped up with chilled dry white wine (the cassis can be a bit sweet, so not sure of the best proportions).

Or the Italian (Venetian?) Spritz - still or sparkling dry white wine (Prosecco?). "Uno spritz con bitter" means Campari added to the wine, topped up with soda/sparkling water and served with a slice of lemon and maybe an olive. Or substitute Cynar liqueur (made from artichokes). Aperol (bitter orange/herb flavour) can also be used and garnished with an orange slice. Has anyone had these?