Jeesh, it's hard to name one as a favorite. Out of them all, my favorite style is the Jet Stream, and this guy's the recent addition that has taken center stage in my VaPer kick
That being said, the Chacom twins are just made for the VaPers, and have been getting noticeably darkened the past couple weeks because of it:
So those would be my three faves for the moment. Likely to change without notice, mind you.
And I just noticed, all three of us have lightly-colored stems pictured. A trend?