Huge coffee vapor here. (I drink my real-life coffee with cream and sugar) Everyone's tastes are very subjective; what works for one person won't for another. We can only offer suggestions what works for us as individuals. Having said that, I've tried at least 10 coffee flavors. The following is what I use often throughout the week, if not daily, listed as favorites first:
Organic Velvet Milkshake(Virgin Vapors) "It's sweet, creamy and buttery with notes of caramel and rum all balanced out by a nice strong shot of Kona Espresso" is how creator Annette describes it, and its true. I could vape this all day. Very smooth, rich, mildly sweet, and complex. This is very subjective, but I liken this to a Starbuck's frappe. This is a very popular juice and probably her largest seller, which is saying something. A little on the expensive side, but it is so worth it. I will always have this in my collection and I can not recommend it enough.
Coffee (Copper Creek) A nice dark roast black coffee to my tastes. I mix about 10% mix of Sweet Cream e-liquid (MyFreedomSmokes).com to make it taste like my home-brewed coffee. Simply fantastic and can be vaped all day. This needs to steep for about a week after delivery for best results. I recommend this one if you are simply looking for a nice black coffee flavor.
Organic Flavored Kona Cream (Vaperite) This to me is very similar to Virgin Vapors' Kona Milkshakes, but with slightly different flavor hints in the background (maybe more mocha?). A strong pleasing aroma just from opening the bottle. Also needs to steep, but for a little more you can order this pre-steeped. A very high quality juice, although I personally favor the Virgin Vapor entry just a shade more. I'm finishing up a small trial-sized bottle of their Double Espresso - it is a authentic espresso flavor that hits hard like you'd expect espresso to be. Not an all day vape I wouldn't think, but I do like it alot and plan on ordering a larger bottle to add some variety to my coffee collection.
Amaretto Coffee w/Whipped Cream (Mrs.T's Bakery) This offers a nice change of pace for me. Nice coffee flavor with a hint of sweet amoretto liquier. Strong flavored yet smooth and balanced (I always order xtra flavor if offered). I like this after dinner or winding down watching TV before bed. Doesn't hurt to let this one steep, either. I got a trial size bottle of her Espresso on my last order but I haven't gotten around to trying it.
I plan on trying Mocha Java Drizzle (Vape Dudes) next due to a lot of positive reviews.