Currently, fantasy. I just love the gloomspite gitz, such fun models. Leviathan looks pretty interesting, thought. But I will probably wait for a new subscription thingy from hachette, it takes time but the saving are awesome.
a decent brush (I like the Windsor & Newton Series 7, size 1
Otherwise, don't sweat it, you can always strip the paint if you don't like it. Plus, try other colors than citadel. They are good, but the pricing is crazy.
AoS, mostly, but the Votan look interesting. Still, love my gitz.
Regarding paints, I really like the Intense series from AK, great paints for a good price. But my racks also collect citadel (contrast is fun!), Army painter (so-so, imho), Valljeo (also OK) and, newest, Two Thin Coates (expensive stuff). But if I activley buying, it's mostly AK.
Yeh, we have a set of Vallejo paints to paint our Kingdom Death: Monster minis someday. Seems like it should be at least good enough for an amateur paint job