Phoenix-clone rebuildable atty, with Stainless Steel vertical wick, for when I just want a short vaping session of a particular e-liquid (and for test-tasting new flavors) Easy to clean between flavors.
Carto-tank, vivi-tank, mini-did-clone, clearomizers--each seems to add its own nuance to the flavor I'm vaping, as does the wicking (SS vs cotton vs silica). Depends what I'm in the mood for at that time. Each has its own quirks for keeping e-liquid at a consistant feed to the coils (twirl, invert, keep horizontal/vertical, etc.).
Have plain cartos available, if I need a smaller profile for stealth vaping. Also used as emergency backup. Not my preferred way to vape, as cannot see liquid level, and doesn't feed liquid to coils at a consistant rate, and sometimes bothersome need to top-off.