Well, mine will undoubtedly be the weirdest, and sadly, it can't be bought anymore, anywhere, but the Achilles RDA is the most perfect piece of vape hardware I've ever used. It has a VERRRRRRRRY tight draw, just what I like, like a carto or those evil sticks we used to suck on.
The flavor is so super-saturated, you have to pat your lips to see if you huffed ejuice, but nope, it's just that flavorful. Also can be built for EXCELLENT throat-hit, if you mount the coil high. It has threading backed with o-rings and a very clever design that prevents leaking unless you go bananas when you fill it -- it h9olds 2.5ml, so with that tight draw, which requires low wattage, 2.5ml is nearly half a day! so, it's also very economical. And light, it's made of titanium. I've never had anything else that vaped this well.
I build it just slightly under 2 ohms, which suits my low-power/cool/low vapor requirements perfectly, using 29ga kanthal around a 3/32 drillbit. I vape it at about 9.5-10 watts.
See, I told you, the weirdest.
Andria
ETA: here's a pic of it, a standard coil that's just under 2 ohms, freshly wicked and filled.