Sure, I'll make one post here, but PM me if you have any other questions so we don't derail ITC's thread. Keep in mind that this reflects my personal opinions; I tend to get nitpicky/OCD about little details.
I was initially between 8 different services: Zamplebox, Craft Vapery, Easy Vape Club, Drip Club, Juice Crate, eJuicePack, Zodist, and Vape Box.
Process of elimination started off pretty easy, as I only vape 3mg and only High VG (anything over 50/50 is fine, really). This narrowed it down to JuiceCrate, Drip Club, and Craft Vapery.
Zamplebox is coming out with a 3mg line soon, but I have read numerous reviews stating that they seem to send repetitive juice brands/flavors/lines that directly go against the "flavor profile" you set up. They're the cheapest of the sub services, but the juice quality and brands do not compare to the likes of the others.
EVC, eJuicePack, and Zodist, all while seemingly great and notable companies, did not pique my interest due to nic levels. I emailed each one who said they had some 3mg available, but most juices would have to either be 0mg or 6mg. Perfectly fine for some people. (I would go with Zodist if I had to).
In order to sub with Vape Box, you need to request an invite. ::insert Ain't Nobody Got Time meme::
Craft Vapery was the most tempting due to how notorious and reputable most of their juices in rotation are. Think Craft Breweries sending you beer compared to going to your local beer mart. The only downside is they are pretty expensive. You do end up saving money with their sub plans, but barely any - and I would rather simply purchase high quality and expensive juices that I know I already enjoy inside of potentially not liking them.
JuiceCrate and Drip Club were very close. Both had exceptional customer service. Both were simple and smart about their packaging and website. Very appealing to me. I ended up going with Drip Club because they were a bit cheaper in $/mL, and also because I recognized a handful more of their brand partners compared to JuiceCrate.
I'm sure I could have picked any of them and been fine with it, but I enjoy exercising frugality in the vape world for obvious reasons; I end up jettisoning money out of my bank account.