Another big fan of OSDIY Shop One Stop Flavors and One Stop Blends. My favorites so far are definitely the Lucky Shot, the Baked Cinnamon Roll, and the Lotta Latte. They are each very good as single flavor mixes at 8-10% (depending upon your individual taste). I started with the 9mL sample size, then bought the 30mL size bottles. Now, it's nothing smaller than the 4oz. bottles anytime I buy them!
Some are also wonderful when used to make combination mixes, too! For example, Kimberly (1 of the owners of OSDIY), has been vaping a combo of Lucky Shot + Lotta Latte as her ADV for years now. After hearing how much she likes it, I finally tried it about 2 months ago. It's a wonderful mix, and I can't put it down. I now go through more of it than any other eliquid I make!
She recommends the following % for the combo: 10% of each if you are vaping regularly. 5% of each if you're subohming. I vape at 1.5-2.1ohms and use just 7-8% each to suit my tastes, but everyone's is different.
I also use the Baked Cinnamon Roll with a few drops of Capella Blueberry Jam (it's potent)...and it's great! The Lucky Shot @ 10% mixed with TFA Key Lime @ 5-6% also makes a wonderful Key Lime Pie eliquid (another one of Kimberly's suggestions).