Ateliar Interactive acrylic paint
This paint is very nice to use, nice and buttery. This is the paint for me. For those of you that haven't tried it, I think it's worth investigating. It can be re-hydrated with water for hours and if that's not long enough, there's an unlocking formula that can be used to re-wet after days. I'm not sure how many.
If you need to blend into your background like an oil painter, this is the acrylic for you.
I've used Galleria, Liquitex and Golden Open. This is far better IMO.