I'm in the hunt for juices too. I've taken to filling an eVod clearo with whatever juice I'm tasting and vaping it all - which for me takes about a full day if I vape it exclusively. I find that my "take" on the juice sometimes changes over the course of the tank. I did find one that I hated at the start of the tank - and I only hated it slightly less at the end, but the rest I've found more like-able toward the end. I've only found one so far that I've really liked from start to finish.
Anyway, my point is that if you've already paid for the juice, it's not a bad idea to vape at least a tank of it before chucking it to the side. (Well, at least unless it is so bad it makes your eyes water or something...) I've currently got 4 eVod tanks, each with a different juice. To me, it's not that hard to clean an eVod tank, especially if you've got others to fall back on. Plus, I think my coils will probably last longer if they're cleaned (I dry burn each time) fairly often.
If you're mainly going to use a tank when vaping, don't you want to know what a juice tastes like in a tank (as opposed to in an atomizer) anyway? I'm playing around with dripping, but most of the time I'd rather just screw on a clearo and vape rather than drip, clean, vape, drip, vape, drip, vape, clean, drip, vape, clean, etc.
Plus, the drip atomizer still has to be cleaned out between flavors, unless you don't mind mixing the flavors. Mixing flavors is OK, but if you're "tasting" the juice, it sorta defeats the purpose.
Just my take. (I'll probably get flamed for saying that.)