A lot of people like the clearomizer types, but I have never found one that I was satisfied with. To my tastes, the 1.7ohm Smoketech single coils and 2.0ohm Boges are nearly perfect with the Twist batteries, so you might to throw a couple of those on your next order.
The
eliquid could also be the problem. If you have a relatively mild mix, the added voltage the Twist provides could be burning the flavor off.