Just to update my post, as I cannot edit it any longer. I buy my e-liquid at Damp Fabriek: https://dampfabriek.com/
There you can find all sort of sweet flavors like Milkshake, Peach, Pancakes (yeah, for real hahaha) and many others.
I really like Pukka Juice - Lime Lemonade. I love citric fruits, so it is an amazing flavor for me. I would also include Black N' Blue and Zap Melonade. They're just amazing!