Suhrim, I would go to LorAnn and get a 1-dram bottle of every single flavor, unless you know you *hate* that flavor. At $1.59, this is the cheapest way to try lots and reduce costs (shipping, too).
It's not a bad idea to consider 1oz bottles of those flavors that we love and you think you might like. If you love coffee, for instance, I'd recommend that you get a 1oz bottle of Keoke Coffee to start. If you love Cherry, Dan would probably recommend that you get a 1oz bottle of LorAnn Cherry.
Those 1-dram (3.7ml) bottles are just enough to flavor a single 30ml of finished juice. If you find a flavor you love, it will run out very very quickly.
Also, don't forget flavor combinations. I never even considered ordering coconut flavor - until I tried NHaler's Almond Joy, and loved it. That made me realize that I needed coconut flavoring to re-create my own brand.
I didn't do any of the above. I've made 3 orders from LorAnn in a month to correct those mistakes.