I can't believe I haven't mentioned this one yet!
Vienna Cream: 3%. This rich, sweet, creamy flavor reminds me of the custard filling in Boston cream pie. If you get a sharp taste, it's mixed too strong, so start low. At 2-3% all by itself, it's smooth and decadent. You can add a little nutmeg, cinnamon, or rum to make a great eggnog. It blends perfectly with Tiramisu. Vienna Cream is also part of my #1 favorite recipe. I'll post it here instead the recipes thread because it uses drops.
IRISH LASS
5ml base (high VG is my preference)
1 drop FA Vienna Cream
1 drop FA Vanilla Classic (the other 2 will also work)
1-2 drops FA Irish Cream
Don't fret over drop size. Mix, shake, set the bottle in warm water a few minutes, shake more, and vape it fresh. In a bcc with 2.2ohm coil, it's so good it makes my eyes roll back in my head.