I personally like Vapor Chef but it seems to be hit and miss. Some people love, some don't.
I've never tried the bloody mango but I've heard good things. Never heard anyone mention Black Diamond.
Thickness depends on your ratio. I've never had anything higher than 70%VG and it was pretty thick. (definitely not the consistency of say Free State Vapor or Virgin Vapor, which tends to be pretty watery)
Expect a long steep time if you get max VG. It took about 3+ weeks for my Honey Peary to steep, compared to the less than a week the 50/50 blend took.
(Flavors I've tried from them and like are Honey Peary, Unicorn Poop, Blue Jazzbery, Black Pom Pom, Nutty Caramel Apple, Slartibartfast)
(Flavors that are just ok were Strawberry VC Cake, Funky Monkey, Fluffy Cake, Peach tea)
(The one flavor I didn't like was PB Nom Noms, the peanut butter had a synthetic taste to it)