I always use Splenda. I'm partial to Strawberry and the BSL strawberry is good, almost too sweet. I have some Pina Colada now and it's not bad at all. Try getting the bottles of the BSL flavoring and add at your leisure.
I go with chocolate. But if you get plain and purchase BSL you can get a variety of flavors and you just add 1/3 of a teaspoon for 1 scoop of protein and you can make it stronger or weaker depending on your liking. If you go with something out there like some fruit flavor be careful because their free flavorings aren't liked by everyone and they're looking for new options. Also can use brc692 for 5% off.