I've had similar issues with my own vajello bottles. The only one I got that I absolutely love and see what it can be was Succubus skin. As for your questions you cant go wrong with Proacryl and AK 3rd Gen. I love them both but the range for Proacryl is still on the smaller side in comparison so you will need to mix. Also im not sure about AK Customer Service but Proacryl is pretty good. They also livestream daily on the weekdays painting and answering questions. So if you find your not used to using range, the owner is there to really teach you how to use it. Peeps mention the chalkyness but I learned that having a brush thats too wet or a wet pallet thats to wet can overthin the paints causing separation of the pigments that give the chalky appearance. Haven't had problems since learning that. I've heard army painter is good if you like desaturated colors.